Improve code quality and write tests

node_modules/@babel/plugin-transform-new-target/LICENSE

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+MIT License
+
+Copyright (c) 2014-present Sebastian McKenzie and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/@babel/plugin-transform-new-target/README.md

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+# @babel/plugin-transform-new-target
+
+> Transforms new.target meta property
+
+See our website [@babel/plugin-transform-new-target](https://babeljs.io/docs/en/next/babel-plugin-transform-new-target.html) for more information.
+
+## Install
+
+Using npm:
+
+```sh
+npm install --save-dev @babel/plugin-transform-new-target
+```
+
+or using yarn:
+
+```sh
+yarn add @babel/plugin-transform-new-target --dev
+```

node_modules/@babel/plugin-transform-new-target/lib/index.js

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+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+function _helperPluginUtils() {
+  const data = require("@babel/helper-plugin-utils");
+
+  _helperPluginUtils = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _core() {
+  const data = require("@babel/core");
+
+  _core = function () {
+    return data;
+  };
+
+  return data;
+}
+
+var _default = (0, _helperPluginUtils().declare)(api => {
+  api.assertVersion(7);
+  return {
+    name: "transform-new-target",
+    visitor: {
+      MetaProperty(path) {
+        const meta = path.get("meta");
+        const property = path.get("property");
+        const {
+          scope
+        } = path;
+
+        if (meta.isIdentifier({
+          name: "new"
+        }) && property.isIdentifier({
+          name: "target"
+        })) {
+          const func = path.findParent(path => {
+            if (path.isClass()) return true;
+
+            if (path.isFunction() && !path.isArrowFunctionExpression()) {
+              if (path.isClassMethod({
+                kind: "constructor"
+              })) {
+                return false;
+              }
+
+              return true;
+            }
+
+            return false;
+          });
+
+          if (!func) {
+            throw path.buildCodeFrameError("new.target must be under a (non-arrow) function or a class.");
+          }
+
+          const {
+            node
+          } = func;
+
+          if (!node.id) {
+            if (func.isMethod()) {
+              path.replaceWith(scope.buildUndefinedNode());
+              return;
+            }
+
+            node.id = scope.generateUidIdentifier("target");
+          }
+
+          const constructor = _core().types.memberExpression(_core().types.thisExpression(), _core().types.identifier("constructor"));
+
+          if (func.isClass()) {
+            path.replaceWith(constructor);
+            return;
+          }
+
+          path.replaceWith(_core().types.conditionalExpression(_core().types.binaryExpression("instanceof", _core().types.thisExpression(), _core().types.cloneNode(node.id)), constructor, scope.buildUndefinedNode()));
+        }
+      }
+
+    }
+  };
+});
+
+exports.default = _default;

node_modules/@babel/plugin-transform-new-target/package.json

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+{
+  "_args": [
+    [
+      "@babel/plugin-transform-new-target@7.4.4",
+      "E:\\python\\setup-php"
+    ]
+  ],
+  "_from": "@babel/plugin-transform-new-target@7.4.4",
+  "_id": "@babel/plugin-transform-new-target@7.4.4",
+  "_inBundle": false,
+  "_integrity": "sha512-r1z3T2DNGQwwe2vPGZMBNjioT2scgWzK9BCnDEh+46z8EEwXBq24uRzd65I7pjtugzPSj921aM15RpESgzsSuA==",
+  "_location": "/@babel/plugin-transform-new-target",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "version",
+    "registry": true,
+    "raw": "@babel/plugin-transform-new-target@7.4.4",
+    "name": "@babel/plugin-transform-new-target",
+    "escapedName": "@babel%2fplugin-transform-new-target",
+    "scope": "@babel",
+    "rawSpec": "7.4.4",
+    "saveSpec": null,
+    "fetchSpec": "7.4.4"
+  },
+  "_requiredBy": [
+    "/@babel/preset-env"
+  ],
+  "_resolved": "https://registry.npmjs.org/@babel/plugin-transform-new-target/-/plugin-transform-new-target-7.4.4.tgz",
+  "_spec": "7.4.4",
+  "_where": "E:\\python\\setup-php",
+  "dependencies": {
+    "@babel/helper-plugin-utils": "^7.0.0"
+  },
+  "description": "Transforms new.target meta property",
+  "devDependencies": {
+    "@babel/core": "^7.4.4",
+    "@babel/helper-plugin-test-runner": "^7.0.0",
+    "@babel/plugin-proposal-class-properties": "^7.4.4",
+    "@babel/plugin-transform-arrow-functions": "^7.0.0"
+  },
+  "gitHead": "2c88694388831b1e5b88e4bbed6781eb2be1edba",
+  "keywords": [
+    "babel-plugin"
+  ],
+  "license": "MIT",
+  "main": "lib/index.js",
+  "name": "@babel/plugin-transform-new-target",
+  "peerDependencies": {
+    "@babel/core": "^7.0.0-0"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-new-target"
+  },
+  "version": "7.4.4"
+}