Index: node_modules/autoprefixer/lib/value.js
===================================================================
--- node_modules/autoprefixer/lib/value.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/autoprefixer/lib/value.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,125 @@
+let OldValue = require('./old-value')
+let Prefixer = require('./prefixer')
+let utils = require('./utils')
+let vendor = require('./vendor')
+
+class Value extends Prefixer {
+  /**
+   * Clone decl for each prefixed values
+   */
+  static save(prefixes, decl) {
+    let prop = decl.prop
+    let result = []
+
+    for (let prefix in decl._autoprefixerValues) {
+      let value = decl._autoprefixerValues[prefix]
+
+      if (value === decl.value) {
+        continue
+      }
+
+      let item
+      let propPrefix = vendor.prefix(prop)
+
+      if (propPrefix === '-pie-') {
+        continue
+      }
+
+      if (propPrefix === prefix) {
+        item = decl.value = value
+        result.push(item)
+        continue
+      }
+
+      let prefixed = prefixes.prefixed(prop, prefix)
+      let rule = decl.parent
+
+      if (!rule.every(i => i.prop !== prefixed)) {
+        result.push(item)
+        continue
+      }
+
+      let trimmed = value.replace(/\s+/, ' ')
+      let already = rule.some(
+        i => i.prop === decl.prop && i.value.replace(/\s+/, ' ') === trimmed
+      )
+
+      if (already) {
+        result.push(item)
+        continue
+      }
+
+      let cloned = this.clone(decl, { value })
+      item = decl.parent.insertBefore(decl, cloned)
+
+      result.push(item)
+    }
+
+    return result
+  }
+
+  /**
+   * Save values with next prefixed token
+   */
+  add(decl, prefix) {
+    if (!decl._autoprefixerValues) {
+      decl._autoprefixerValues = {}
+    }
+    let value = decl._autoprefixerValues[prefix] || this.value(decl)
+
+    let before
+    do {
+      before = value
+      value = this.replace(value, prefix)
+      if (value === false) return
+    } while (value !== before)
+
+    decl._autoprefixerValues[prefix] = value
+  }
+
+  /**
+   * Is declaration need to be prefixed
+   */
+  check(decl) {
+    let value = decl.value
+    if (!value.includes(this.name)) {
+      return false
+    }
+
+    return !!value.match(this.regexp())
+  }
+
+  /**
+   * Return function to fast find prefixed value
+   */
+  old(prefix) {
+    return new OldValue(this.name, prefix + this.name)
+  }
+
+  /**
+   * Lazy regexp loading
+   */
+  regexp() {
+    return this.regexpCache || (this.regexpCache = utils.regexp(this.name))
+  }
+
+  /**
+   * Add prefix to values in string
+   */
+  replace(string, prefix) {
+    return string.replace(this.regexp(), `$1${prefix}$2`)
+  }
+
+  /**
+   * Get value with comments if it was not changed
+   */
+  value(decl) {
+    if (decl.raws.value && decl.raws.value.value === decl.value) {
+      return decl.raws.value.raw
+    } else {
+      return decl.value
+    }
+  }
+}
+
+module.exports = Value