lock @babel/plugin-transform-typescript again

7.5.1 still has bug

https://github.com/babel/babel/issues/10156#issuecomment-508924725

package.json

@@ -97,6 +97,7 @@
   },
   "devDependencies": {
     "@ant-design/colors": "^3.1.0",
+    "@babel/plugin-transform-typescript": "^7.4.5",
     "@packtracker/webpack-plugin": "^2.0.1",
     "@sentry/browser": "^5.4.0",
     "@types/classnames": "^2.2.8",