1 | # [4.3.1](https://github.com/TehShrike/deepmerge/releases/tag/v4.3.1)
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2 |
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3 | - Fix type definition for arrayMerge options. [#239](https://github.com/TehShrike/deepmerge/pull/239)
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4 |
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5 | # [4.3.0](https://github.com/TehShrike/deepmerge/releases/tag/v4.3.0)
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6 |
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7 | - Avoid thrown errors if the target doesn't have `propertyIsEnumerable`. [#252](https://github.com/TehShrike/deepmerge/pull/252)
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8 |
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9 | # [4.2.2](https://github.com/TehShrike/deepmerge/releases/tag/v4.2.2)
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10 |
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11 | - `isMergeableObject` is now only called if there are two values that could be merged. [a34dd4d2](https://github.com/TehShrike/deepmerge/commit/a34dd4d25bf5e250653540a2022bc832c7b00a19)
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12 |
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13 | # [4.2.1](https://github.com/TehShrike/deepmerge/releases/tag/v4.2.1)
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14 |
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15 | - Fix: falsey values can now be merged. [#170](https://github.com/TehShrike/deepmerge/issues/170)
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16 |
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17 | # [4.2.0](https://github.com/TehShrike/deepmerge/releases/tag/v4.2.0)
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18 |
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19 | - Properties are now only overwritten if they exist on the target object and are enumerable. [#164](https://github.com/TehShrike/deepmerge/pull/164)
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20 |
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21 | Technically this could probably be a patch release since "which properties get overwritten" wasn't documented and accidentally overwriting a built-in function or some function up the property chain would almost certainly be undesirable, but it feels like a gray area, so here we are with a feature version bump.
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22 |
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23 | # [4.1.2](https://github.com/TehShrike/deepmerge/releases/tag/v4.1.2)
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24 |
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25 | - Rolled back #167 since `Object.assign` breaks ES5 support. [55067352](https://github.com/TehShrike/deepmerge/commit/55067352a92c65a6c44a5165f3387720aae1e192)
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26 |
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27 | # [4.1.1](https://github.com/TehShrike/deepmerge/releases/tag/v4.1.1)
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28 |
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29 | - The `options` argument is no longer mutated [#167](https://github.com/TehShrike/deepmerge/pull/167)
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30 |
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31 | # [4.1.0](https://github.com/TehShrike/deepmerge/releases/tag/v4.1.0)
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32 |
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33 | - `cloneUnlessOtherwiseSpecified` is now exposed to the `arrayMerge` function [#165](https://github.com/TehShrike/deepmerge/pull/165)
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34 |
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35 | # [4.0.0](https://github.com/TehShrike/deepmerge/releases/tag/v4.0.0)
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36 |
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37 | - The `main` entry point in `package.json` is now a CommonJS module instead of a UMD module [#155](https://github.com/TehShrike/deepmerge/pull/155)
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38 |
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39 | # [3.3.0](https://github.com/TehShrike/deepmerge/releases/tag/v3.3.0)
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40 |
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41 | - Enumerable Symbol properties are now copied [#151](https://github.com/TehShrike/deepmerge/pull/151)
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42 |
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43 | # [3.2.1](https://github.com/TehShrike/deepmerge/releases/tag/v3.2.1)
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44 |
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45 | - bumping dev dependency versions to try to shut up bogus security warnings from Github/npm [#149](https://github.com/TehShrike/deepmerge/pull/149)
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46 |
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47 | # [3.2.0](https://github.com/TehShrike/deepmerge/releases/tag/v3.2.0)
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48 |
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49 | - feature: added the [`customMerge`](https://github.com/TehShrike/deepmerge#custommerge) option [#133](https://github.com/TehShrike/deepmerge/pull/133)
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50 |
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51 | # [3.1.0](https://github.com/TehShrike/deepmerge/releases/tag/v3.1.0)
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52 |
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53 | - typescript typing: make the `all` function generic [#129](https://github.com/TehShrike/deepmerge/pull/129)
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54 |
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55 | # [3.0.0](https://github.com/TehShrike/deepmerge/releases/tag/v3.0.0)
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56 |
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57 | - drop ES module build [#123](https://github.com/TehShrike/deepmerge/issues/123)
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58 |
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59 | # [2.2.1](https://github.com/TehShrike/deepmerge/releases/tag/v2.2.1)
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60 |
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61 | - bug: typescript export type was wrong [#121](https://github.com/TehShrike/deepmerge/pull/121)
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62 |
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63 | # [2.2.0](https://github.com/TehShrike/deepmerge/releases/tag/v2.2.0)
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64 |
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65 | - feature: added TypeScript typings [#119](https://github.com/TehShrike/deepmerge/pull/119)
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66 |
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67 | # [2.1.1](https://github.com/TehShrike/deepmerge/releases/tag/v2.1.1)
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68 |
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69 | - documentation: Rename "methods" to "api", note ESM syntax [#103](https://github.com/TehShrike/deepmerge/pull/103)
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70 | - documentation: Fix grammar [#107](https://github.com/TehShrike/deepmerge/pull/107)
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71 | - documentation: Restructure headers for clarity + some wording tweaks [108](https://github.com/TehShrike/deepmerge/pull/108) + [109](https://github.com/TehShrike/deepmerge/pull/109)
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72 |
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73 |
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74 | # [2.1.0](https://github.com/TehShrike/deepmerge/releases/tag/v2.1.0)
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75 |
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76 | - feature: Support a custom `isMergeableObject` function [#96](https://github.com/TehShrike/deepmerge/pull/96)
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77 | - documentation: note a Webpack bug that some users might need to work around [#100](https://github.com/TehShrike/deepmerge/pull/100)
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78 |
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79 | # [2.0.1](https://github.com/TehShrike/deepmerge/releases/tag/v2.0.1)
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80 |
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81 | - documentation: fix the old array merge algorithm in the readme. [#84](https://github.com/TehShrike/deepmerge/pull/84)
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82 |
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83 | # [2.0.0](https://github.com/TehShrike/deepmerge/releases/tag/v2.0.0)
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84 |
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85 | - breaking: the array merge algorithm has changed from a complicated thing to `target.concat(source).map(element => cloneUnlessOtherwiseSpecified(element, optionsArgument))`
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86 | - breaking: The `clone` option now defaults to `true`
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87 | - feature: `merge.all` now accepts an array of any size, even 0 or 1 elements
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88 |
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89 | See [pull request 77](https://github.com/TehShrike/deepmerge/pull/77).
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90 |
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91 | # [1.5.2](https://github.com/TehShrike/deepmerge/releases/tag/v1.5.2)
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92 |
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93 | - fix: no longer attempts to merge React elements [#76](https://github.com/TehShrike/deepmerge/issues/76)
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94 |
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95 | # [1.5.1](https://github.com/TehShrike/deepmerge/releases/tag/v1.5.1)
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96 |
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97 | - bower support: officially dropping bower support. If you use bower, please depend on the [unpkg distribution](https://unpkg.com/deepmerge/dist/umd.js). See [#63](https://github.com/TehShrike/deepmerge/issues/63)
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98 |
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99 | # [1.5.0](https://github.com/TehShrike/deepmerge/releases/tag/v1.5.0)
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100 |
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101 | - bug fix: merging objects into arrays was allowed, and doesn't make any sense. [#65](https://github.com/TehShrike/deepmerge/issues/65) published as a feature release instead of a patch because it is a decent behavior change.
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102 |
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103 | # [1.4.4](https://github.com/TehShrike/deepmerge/releases/tag/v1.4.4)
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104 |
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105 | - bower support: updated `main` in bower.json
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106 |
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107 | # [1.4.3](https://github.com/TehShrike/deepmerge/releases/tag/v1.4.3)
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108 |
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109 | - bower support: inline is-mergeable-object in a new CommonJS build, so that people using both bower and CommonJS can bundle the library [0b34e6](https://github.com/TehShrike/deepmerge/commit/0b34e6e95f989f2fc8091d25f0d291c08f3d2d24)
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110 |
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111 | # [1.4.2](https://github.com/TehShrike/deepmerge/releases/tag/v1.4.2)
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112 |
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113 | - performance: bump is-mergeable-object dependency version for a slight performance improvement [5906c7](https://github.com/TehShrike/deepmerge/commit/5906c765d691d48e83d76efbb0d4b9ca150dc12c)
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114 |
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115 | # [1.4.1](https://github.com/TehShrike/deepmerge/releases/tag/v1.4.1)
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116 |
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117 | - documentation: fix unpkg link [acc45b](https://github.com/TehShrike/deepmerge/commit/acc45be85519c1df906a72ecb24764b622d18d47)
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118 |
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119 | # [1.4.0](https://github.com/TehShrike/deepmerge/releases/tag/v1.4.0)
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120 |
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121 | - api: instead of only exporting a UMD module, expose a UMD module with `pkg.main`, a CJS module with `pkg.browser`, and an ES module with `pkg.module` [#62](https://github.com/TehShrike/deepmerge/pull/62)
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122 |
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123 | # [1.3.2](https://github.com/TehShrike/deepmerge/releases/tag/v1.3.2)
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124 |
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125 | - documentation: note the minified/gzipped file sizes [56](https://github.com/TehShrike/deepmerge/pull/56)
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126 | - documentation: make data structures more readable in merge example: pull request [57](https://github.com/TehShrike/deepmerge/pull/57)
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127 |
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128 | # [1.3.1](https://github.com/TehShrike/deepmerge/releases/tag/v1.3.1)
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129 |
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130 | - documentation: clarify and test some array merging documentation: pull request [51](https://github.com/TehShrike/deepmerge/pull/51)
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131 |
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132 | # [1.3.0](https://github.com/TehShrike/deepmerge/releases/tag/v1.3.0)
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133 |
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134 | - feature: `merge.all`, a merge function that merges any number of objects: pull request [50](https://github.com/TehShrike/deepmerge/pull/50)
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135 |
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136 | # [1.2.0](https://github.com/TehShrike/deepmerge/releases/tag/v1.2.0)
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137 |
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138 | - fix: an error that would be thrown when an array would be merged onto a truthy non-array value: pull request [46](https://github.com/TehShrike/deepmerge/pull/46)
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139 | - feature: the ability to clone: Issue [28](https://github.com/TehShrike/deepmerge/issues/28), pull requests [44](https://github.com/TehShrike/deepmerge/pull/44) and [48](https://github.com/TehShrike/deepmerge/pull/48)
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140 | - maintenance: added tests + travis to `.npmignore`: pull request [47](https://github.com/TehShrike/deepmerge/pull/47)
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141 |
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142 | # [1.1.1](https://github.com/TehShrike/deepmerge/releases/tag/v1.1.1)
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143 |
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144 | - fix an issue where an error was thrown when merging an array onto a non-array: [Pull request 46](https://github.com/TehShrike/deepmerge/pull/46)
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145 |
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146 | # [1.1.0](https://github.com/TehShrike/deepmerge/releases/tag/v1.1.0)
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147 |
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148 | - allow consumers to specify their own array merging algorithm: [Pull request 37](https://github.com/TehShrike/deepmerge/pull/37)
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149 |
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150 | # [1.0.3](https://github.com/TehShrike/deepmerge/releases/tag/v1.0.3)
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151 |
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152 | - adding bower.json back: [Issue 38](https://github.com/TehShrike/deepmerge/pull/38)
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153 | - updating keywords and Github links in package.json [bc3898e](https://github.com/TehShrike/deepmerge/commit/bc3898e587a56f74591328f40f656b0152c1d5eb)
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154 |
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155 | # [1.0.2](https://github.com/TehShrike/deepmerge/releases/tag/v1.0.2)
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156 |
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157 | - Updating the readme: dropping bower, testing that the example works: [7102fc](https://github.com/TehShrike/deepmerge/commit/7102fcc4ddec11e2d33205866f9f18df14e5aeb5)
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158 |
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159 | # [1.0.1](https://github.com/TehShrike/deepmerge/releases/tag/v1.0.1)
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160 |
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161 | - `null`, dates, and regular expressions are now properly merged in arrays: [Issue 18](https://github.com/TehShrike/deepmerge/pull/18), plus commit: [ef1c6b](https://github.com/TehShrike/deepmerge/commit/ef1c6bac8350ba12a24966f0bc7da02560827586)
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162 |
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163 | # 1.0.0
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164 |
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165 | - Should only be a patch change, because this module is READY. [Issue 15](https://github.com/TehShrike/deepmerge/issues/15)
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166 | - Regular expressions are now treated like primitive values when merging: [Issue 30](https://github.com/TehShrike/deepmerge/pull/30)
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167 | - Dates are now treated like primitives when merging: [Issue 31](https://github.com/TehShrike/deepmerge/issues/31)
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