docs：更新文档

node_modules/postcss-discard-comments/dist/lib/commentParser.js

@@ -0,0 +1,31 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+exports.default = commentParser;
+function commentParser(input) {
+    const tokens = [];
+    const length = input.length;
+    let pos = 0;
+    let next;
+
+    while (pos < length) {
+        next = input.indexOf('/*', pos);
+
+        if (~next) {
+            tokens.push([0, pos, next]);
+            pos = next;
+
+            next = input.indexOf('*/', pos + 2);
+            tokens.push([1, pos + 2, next]);
+            pos = next + 2;
+        } else {
+            tokens.push([0, pos, length]);
+            pos = length;
+        }
+    }
+
+    return tokens;
+};
+module.exports = exports['default'];

node_modules/postcss-discard-comments/dist/lib/commentRemover.js

@@ -0,0 +1,32 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+function CommentRemover(options) {
+    this.options = options;
+}
+
+CommentRemover.prototype.canRemove = function (comment) {
+    const remove = this.options.remove;
+
+    if (remove) {
+        return remove(comment);
+    } else {
+        const isImportant = comment.indexOf('!') === 0;
+
+        if (!isImportant) {
+            return true;
+        }
+
+        if (this.options.removeAll || this._hasFirst) {
+            return true;
+        } else if (this.options.removeAllButFirst && !this._hasFirst) {
+            this._hasFirst = true;
+            return false;
+        }
+    }
+};
+
+exports.default = CommentRemover;
+module.exports = exports['default'];