Index: node_modules/postcss/lib/container.d.ts
===================================================================
--- node_modules/postcss/lib/container.d.ts	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/postcss/lib/container.d.ts	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,483 @@
+import AtRule from './at-rule.js'
+import Comment from './comment.js'
+import Declaration from './declaration.js'
+import Node, { ChildNode, ChildProps, NodeProps } from './node.js'
+import { Root } from './postcss.js'
+import Rule from './rule.js'
+
+declare namespace Container {
+  export type ContainerWithChildren<Child extends Node = ChildNode> = {
+    nodes: Child[]
+  } & (
+    | AtRule
+    | Root
+    | Rule
+  )
+
+  export interface ValueOptions {
+    /**
+     * String that’s used to narrow down values and speed up the regexp search.
+     */
+    fast?: string
+
+    /**
+     * An array of property names.
+     */
+    props?: readonly string[]
+  }
+
+  export interface ContainerProps extends NodeProps {
+    nodes?: readonly (ChildProps | Node)[]
+  }
+
+  /**
+   * All types that can be passed into container methods to create or add a new
+   * child node.
+   */
+  export type NewChild =
+    | ChildProps
+    | Node
+    | readonly ChildProps[]
+    | readonly Node[]
+    | readonly string[]
+    | string
+    | undefined
+
+  // eslint-disable-next-line @typescript-eslint/no-use-before-define
+  export { Container_ as default }
+}
+
+/**
+ * The `Root`, `AtRule`, and `Rule` container nodes
+ * inherit some common methods to help work with their children.
+ *
+ * Note that all containers can store any content. If you write a rule inside
+ * a rule, PostCSS will parse it.
+ */
+declare abstract class Container_<Child extends Node = ChildNode> extends Node {
+  /**
+   * An array containing the container’s children.
+   *
+   * ```js
+   * const root = postcss.parse('a { color: black }')
+   * root.nodes.length           //=> 1
+   * root.nodes[0].selector      //=> 'a'
+   * root.nodes[0].nodes[0].prop //=> 'color'
+   * ```
+   */
+  nodes: Child[] | undefined
+
+  /**
+   * The container’s first child.
+   *
+   * ```js
+   * rule.first === rules.nodes[0]
+   * ```
+   */
+  get first(): Child | undefined
+
+  /**
+   * The container’s last child.
+   *
+   * ```js
+   * rule.last === rule.nodes[rule.nodes.length - 1]
+   * ```
+   */
+  get last(): Child | undefined
+  /**
+   * Inserts new nodes to the end of the container.
+   *
+   * ```js
+   * const decl1 = new Declaration({ prop: 'color', value: 'black' })
+   * const decl2 = new Declaration({ prop: 'background-color', value: 'white' })
+   * rule.append(decl1, decl2)
+   *
+   * root.append({ name: 'charset', params: '"UTF-8"' })  // at-rule
+   * root.append({ selector: 'a' })                       // rule
+   * rule.append({ prop: 'color', value: 'black' })       // declaration
+   * rule.append({ text: 'Comment' })                     // comment
+   *
+   * root.append('a {}')
+   * root.first.append('color: black; z-index: 1')
+   * ```
+   *
+   * @param nodes New nodes.
+   * @return This node for methods chain.
+   */
+  append(...nodes: Container.NewChild[]): this
+  assign(overrides: Container.ContainerProps | object): this
+  clone(overrides?: Partial<Container.ContainerProps>): this
+
+  cloneAfter(overrides?: Partial<Container.ContainerProps>): this
+
+  cloneBefore(overrides?: Partial<Container.ContainerProps>): this
+  /**
+   * Iterates through the container’s immediate children,
+   * calling `callback` for each child.
+   *
+   * Returning `false` in the callback will break iteration.
+   *
+   * This method only iterates through the container’s immediate children.
+   * If you need to recursively iterate through all the container’s descendant
+   * nodes, use `Container#walk`.
+   *
+   * Unlike the for `{}`-cycle or `Array#forEach` this iterator is safe
+   * if you are mutating the array of child nodes during iteration.
+   * PostCSS will adjust the current index to match the mutations.
+   *
+   * ```js
+   * const root = postcss.parse('a { color: black; z-index: 1 }')
+   * const rule = root.first
+   *
+   * for (const decl of rule.nodes) {
+   *   decl.cloneBefore({ prop: '-webkit-' + decl.prop })
+   *   // Cycle will be infinite, because cloneBefore moves the current node
+   *   // to the next index
+   * }
+   *
+   * rule.each(decl => {
+   *   decl.cloneBefore({ prop: '-webkit-' + decl.prop })
+   *   // Will be executed only for color and z-index
+   * })
+   * ```
+   *
+   * @param callback Iterator receives each node and index.
+   * @return Returns `false` if iteration was broke.
+   */
+  each(
+    callback: (node: Child, index: number) => false | void
+  ): false | undefined
+
+  /**
+   * Returns `true` if callback returns `true`
+   * for all of the container’s children.
+   *
+   * ```js
+   * const noPrefixes = rule.every(i => i.prop[0] !== '-')
+   * ```
+   *
+   * @param condition Iterator returns true or false.
+   * @return Is every child pass condition.
+   */
+  every(
+    condition: (node: Child, index: number, nodes: Child[]) => boolean
+  ): boolean
+  /**
+   * Returns a `child`’s index within the `Container#nodes` array.
+   *
+   * ```js
+   * rule.index( rule.nodes[2] ) //=> 2
+   * ```
+   *
+   * @param child Child of the current container.
+   * @return Child index.
+   */
+  index(child: Child | number): number
+
+  /**
+   * Insert new node after old node within the container.
+   *
+   * @param oldNode Child or child’s index.
+   * @param newNode New node.
+   * @return This node for methods chain.
+   */
+  insertAfter(oldNode: Child | number, newNode: Container.NewChild): this
+
+  /**
+   * Traverses the container’s descendant nodes, calling callback
+   * for each comment node.
+   *
+   * Like `Container#each`, this method is safe
+   * to use if you are mutating arrays during iteration.
+   *
+   * ```js
+   * root.walkComments(comment => {
+   *   comment.remove()
+   * })
+   * ```
+   *
+   * @param callback Iterator receives each node and index.
+   * @return Returns `false` if iteration was broke.
+   */
+
+  /**
+   * Insert new node before old node within the container.
+   *
+   * ```js
+   * rule.insertBefore(decl, decl.clone({ prop: '-webkit-' + decl.prop }))
+   * ```
+   *
+   * @param oldNode Child or child’s index.
+   * @param newNode New node.
+   * @return This node for methods chain.
+   */
+  insertBefore(oldNode: Child | number, newNode: Container.NewChild): this
+  /**
+   * Inserts new nodes to the start of the container.
+   *
+   * ```js
+   * const decl1 = new Declaration({ prop: 'color', value: 'black' })
+   * const decl2 = new Declaration({ prop: 'background-color', value: 'white' })
+   * rule.prepend(decl1, decl2)
+   *
+   * root.append({ name: 'charset', params: '"UTF-8"' })  // at-rule
+   * root.append({ selector: 'a' })                       // rule
+   * rule.append({ prop: 'color', value: 'black' })       // declaration
+   * rule.append({ text: 'Comment' })                     // comment
+   *
+   * root.append('a {}')
+   * root.first.append('color: black; z-index: 1')
+   * ```
+   *
+   * @param nodes New nodes.
+   * @return This node for methods chain.
+   */
+  prepend(...nodes: Container.NewChild[]): this
+
+  /**
+   * Add child to the end of the node.
+   *
+   * ```js
+   * rule.push(new Declaration({ prop: 'color', value: 'black' }))
+   * ```
+   *
+   * @param child New node.
+   * @return This node for methods chain.
+   */
+  push(child: Child): this
+
+  /**
+   * Removes all children from the container
+   * and cleans their parent properties.
+   *
+   * ```js
+   * rule.removeAll()
+   * rule.nodes.length //=> 0
+   * ```
+   *
+   * @return This node for methods chain.
+   */
+  removeAll(): this
+
+  /**
+   * Removes node from the container and cleans the parent properties
+   * from the node and its children.
+   *
+   * ```js
+   * rule.nodes.length  //=> 5
+   * rule.removeChild(decl)
+   * rule.nodes.length  //=> 4
+   * decl.parent        //=> undefined
+   * ```
+   *
+   * @param child Child or child’s index.
+   * @return This node for methods chain.
+   */
+  removeChild(child: Child | number): this
+
+  replaceValues(
+    pattern: RegExp | string,
+    replaced: { (substring: string, ...args: any[]): string } | string
+  ): this
+  /**
+   * Passes all declaration values within the container that match pattern
+   * through callback, replacing those values with the returned result
+   * of callback.
+   *
+   * This method is useful if you are using a custom unit or function
+   * and need to iterate through all values.
+   *
+   * ```js
+   * root.replaceValues(/\d+rem/, { fast: 'rem' }, string => {
+   *   return 15 * parseInt(string) + 'px'
+   * })
+   * ```
+   *
+   * @param pattern      Replace pattern.
+   * @param {object} options             Options to speed up the search.
+   * @param replaced   String to replace pattern or callback
+   *                                     that returns a new value. The callback
+   *                                     will receive the same arguments
+   *                                     as those passed to a function parameter
+   *                                     of `String#replace`.
+   * @return This node for methods chain.
+   */
+  replaceValues(
+    pattern: RegExp | string,
+    options: Container.ValueOptions,
+    replaced: { (substring: string, ...args: any[]): string } | string
+  ): this
+
+  /**
+   * Returns `true` if callback returns `true` for (at least) one
+   * of the container’s children.
+   *
+   * ```js
+   * const hasPrefix = rule.some(i => i.prop[0] === '-')
+   * ```
+   *
+   * @param condition Iterator returns true or false.
+   * @return Is some child pass condition.
+   */
+  some(
+    condition: (node: Child, index: number, nodes: Child[]) => boolean
+  ): boolean
+
+  /**
+   * Traverses the container’s descendant nodes, calling callback
+   * for each node.
+   *
+   * Like container.each(), this method is safe to use
+   * if you are mutating arrays during iteration.
+   *
+   * If you only need to iterate through the container’s immediate children,
+   * use `Container#each`.
+   *
+   * ```js
+   * root.walk(node => {
+   *   // Traverses all descendant nodes.
+   * })
+   * ```
+   *
+   * @param callback Iterator receives each node and index.
+   * @return  Returns `false` if iteration was broke.
+   */
+  walk(
+    callback: (node: ChildNode, index: number) => false | void
+  ): false | undefined
+
+  /**
+   * Traverses the container’s descendant nodes, calling callback
+   * for each at-rule node.
+   *
+   * If you pass a filter, iteration will only happen over at-rules
+   * that have matching names.
+   *
+   * Like `Container#each`, this method is safe
+   * to use if you are mutating arrays during iteration.
+   *
+   * ```js
+   * root.walkAtRules(rule => {
+   *   if (isOld(rule.name)) rule.remove()
+   * })
+   *
+   * let first = false
+   * root.walkAtRules('charset', rule => {
+   *   if (!first) {
+   *     first = true
+   *   } else {
+   *     rule.remove()
+   *   }
+   * })
+   * ```
+   *
+   * @param name     String or regular expression to filter at-rules by name.
+   * @param callback Iterator receives each node and index.
+   * @return Returns `false` if iteration was broke.
+   */
+  walkAtRules(
+    nameFilter: RegExp | string,
+    callback: (atRule: AtRule, index: number) => false | void
+  ): false | undefined
+  walkAtRules(
+    callback: (atRule: AtRule, index: number) => false | void
+  ): false | undefined
+
+  walkComments(
+    callback: (comment: Comment, indexed: number) => false | void
+  ): false | undefined
+  walkComments(
+    callback: (comment: Comment, indexed: number) => false | void
+  ): false | undefined
+
+  /**
+   * Traverses the container’s descendant nodes, calling callback
+   * for each declaration node.
+   *
+   * If you pass a filter, iteration will only happen over declarations
+   * with matching properties.
+   *
+   * ```js
+   * root.walkDecls(decl => {
+   *   checkPropertySupport(decl.prop)
+   * })
+   *
+   * root.walkDecls('border-radius', decl => {
+   *   decl.remove()
+   * })
+   *
+   * root.walkDecls(/^background/, decl => {
+   *   decl.value = takeFirstColorFromGradient(decl.value)
+   * })
+   * ```
+   *
+   * Like `Container#each`, this method is safe
+   * to use if you are mutating arrays during iteration.
+   *
+   * @param prop     String or regular expression to filter declarations
+   *                 by property name.
+   * @param callback Iterator receives each node and index.
+   * @return Returns `false` if iteration was broke.
+   */
+  walkDecls(
+    propFilter: RegExp | string,
+    callback: (decl: Declaration, index: number) => false | void
+  ): false | undefined
+  walkDecls(
+    callback: (decl: Declaration, index: number) => false | void
+  ): false | undefined
+  /**
+   * Traverses the container’s descendant nodes, calling callback
+   * for each rule node.
+   *
+   * If you pass a filter, iteration will only happen over rules
+   * with matching selectors.
+   *
+   * Like `Container#each`, this method is safe
+   * to use if you are mutating arrays during iteration.
+   *
+   * ```js
+   * const selectors = []
+   * root.walkRules(rule => {
+   *   selectors.push(rule.selector)
+   * })
+   * console.log(`Your CSS uses ${ selectors.length } selectors`)
+   * ```
+   *
+   * @param selector String or regular expression to filter rules by selector.
+   * @param callback Iterator receives each node and index.
+   * @return Returns `false` if iteration was broke.
+   */
+  walkRules(
+    selectorFilter: RegExp | string,
+    callback: (rule: Rule, index: number) => false | void
+  ): false | undefined
+  walkRules(
+    callback: (rule: Rule, index: number) => false | void
+  ): false | undefined
+  /**
+   * An internal method that converts a {@link NewChild} into a list of actual
+   * child nodes that can then be added to this container.
+   *
+   * This ensures that the nodes' parent is set to this container, that they use
+   * the correct prototype chain, and that they're marked as dirty.
+   *
+   * @param mnodes The new node or nodes to add.
+   * @param sample A node from whose raws the new node's `before` raw should be
+   *               taken.
+   * @param type   This should be set to `'prepend'` if the new nodes will be
+   *               inserted at the beginning of the container.
+   * @hidden
+   */
+  protected normalize(
+    nodes: Container.NewChild,
+    sample: Node | undefined,
+    type?: 'prepend' | false
+  ): Child[]
+}
+
+declare class Container<
+  Child extends Node = ChildNode
+> extends Container_<Child> {}
+
+export = Container