Upgrade project structure to webpack 4.

Remove unused dependencies.
Rename all .jsx files into .js.

webpack-utils/intl-json-loader/index.js

@@ -0,0 +1,25 @@
+const path = require('path');
+
+module.exports = function(input) {
+    this.cacheable && this.cacheable();
+
+    const moduleId = this.context
+        .replace(path.join(this.rootContext, 'src'), '')
+        .replace(/^\/|\/$/g, '')
+        .replace(/\//g, '.');
+
+    const json = JSON.parse(input);
+    const result = JSON.stringify(Object.keys(json).reduce((translations, key) => {
+        translations[key] = {
+            id: `${moduleId}.${key}`,
+            defaultMessage: json[key],
+        };
+
+        return translations;
+    }, {}));
+
+    return `
+        import { defineMessages } from 'react-intl';
+        export default defineMessages(${result})
+    `;
+};

webpack-utils/intl-json-loader/package.json

@@ -0,0 +1,7 @@
+{
+    "name": "intl-json-loader",
+    "version": "1.0.0",
+    "main": "index.js",
+    "dependencies": {
+    }
+}

webpack-utils/intl-loader.js

@@ -1,21 +0,0 @@
-module.exports = function() {
-    this.cacheable && this.cacheable();
-
-    var moduleId = this.context
-        .replace(this.options.resolve.root, '')
-        .replace(/^\/|\/$/g, '')
-        .replace(/\//g, '.');
-
-    var content = this.inputValue[0];
-    content = JSON.stringify(Object.keys(content).reduce(function(translations, key) {
-        translations[key] = {
-            id: moduleId + '.' + key,
-            defaultMessage: content[key]
-        };
-
-        return translations;
-    }, {}));
-
-    return 'import { defineMessages } from \'react-intl\';'
-        + 'export default defineMessages(' + content + ')';
-};

webpack-utils/package.json

@@ -1,10 +0,0 @@
-{
-  "name": "webpack-utils",
-  "version": "1.0.0",
-  "description": "",
-  "keywords": [],
-  "author": "",
-  "dependencies": {
-    "loader-utils": "^0.2.12"
-  }
-}