Simplify building styles process

Author: wojtekmaj

copy-styles.js

@@ -7,11 +7,3 @@ fs.copyFile('src/DateTimePicker.less', 'dist/DateTimePicker.less', (error) => {
   // eslint-disable-next-line no-console
   console.log('DateTimePicker.less copied successfully.');
 });
-
-fs.copyFile('src/DateTimePicker.css', 'dist/DateTimePicker.css', (error) => {
-  if (error) {
-    throw error;
-  }
-  // eslint-disable-next-line no-console
-  console.log('DateTimePicker.css copied successfully.');
-});

package.json

@@ -5,9 +5,9 @@
   "main": "dist/entry.js",
   "es6": "src/entry.js",
   "scripts": {
-    "build": "npm run build-js && npm run build-styles && npm run copy-styles",
+    "build": "npm run build-js && npm run copy-styles && npm run build-styles",
     "build-js": "babel src -d dist --ignore **/__tests__",
-    "build-styles": "lessc ./src/DateTimePicker.less ./src/DateTimePicker.css",
+    "build-styles": "lessc ./dist/DateTimePicker.less ./dist/DateTimePicker.css",
     "copy-styles": "node ./copy-styles.js",
     "prepublishOnly": "npm run build",
     "test": "npm run test-eslint && npm run test-jest",