gh-440: Remove env vars to allow building on windows without issues

.babelrc.js

@@ -1,14 +1,3 @@
 module.exports = {
-    presets: [
-        [
-            '@babel/env',
-            {
-                modules: process.env.MODULE ? false : 'commonjs',
-                targets: ['last 2 versions', 'not dead'],
-            },
-        ],
-        '@babel/preset-react',
-        '@babel/preset-typescript',
-    ],
-    plugins: ['@babel/plugin-proposal-class-properties'],
+    extends: './babel.config.cjs.json',
 };

babel.config.cjs.json

@@ -0,0 +1,12 @@
+{
+    "extends": "./babel.config.json",
+    "presets": [
+        [
+            "@babel/env",
+            {
+                "modules": "commonjs",
+                "targets": ["last 2 versions", "not dead"]
+            }
+        ]
+    ]
+}

babel.config.json

@@ -0,0 +1,14 @@
+{
+    "presets": [
+        [
+            "@babel/env",
+            {
+                "modules": false,
+                "targets": ["last 2 versions", "not dead"]
+            }
+        ],
+        "@babel/preset-react",
+        "@babel/preset-typescript"
+    ],
+    "plugins": ["@babel/plugin-proposal-class-properties"]
+}

package.json

@@ -45,8 +45,8 @@
         "update-snapshots": "jest --updateSnapshot",
         "build": "yarn lib:build",
         "lib:build": "yarn lib:build-cjs && yarn lib:build-es && yarn lib:build-styles && yarn lib:build-types",
-        "lib:build-cjs": "babel ./src -d lib/cjs --ignore './src/__tests__'",
-        "lib:build-es": "MODULE=true babel ./src -d lib/es --ignore './src/__tests__'",
+        "lib:build-cjs": "babel ./src -d lib/cjs --ignore './src/__tests__' --extensions '.ts,.tsx' --config-file ./babel.config.cjs.json",
+        "lib:build-es": "babel ./src -d lib/es --ignore './src/__tests__' --extensions '.ts,.tsx' --config-file ./babel.config.json",
         "lib:build-styles": "mkdir -p lib/styles && node-sass src/carousel.scss > lib/styles/carousel.css && node-sass --output-style compressed src/carousel.scss > lib/styles/carousel.min.css",
         "lib:build-types": "tsc -p tsconfig.types.json",
         "lib:pre-publish": "npm version patch && git push origin master",