message: TS hardening, part 1
diff: {
  "compilerOptions": {
  + "forceConsistentCasingInFileNames": true,
  + "noFallthroughCasesInSwitch": true,
  + "noImplicitReturns": false,
  + "noUnusedLocals": true,
  + "noUnusedParameters": true,
  + "strict": false,
  "target": "ES3"
  },
  "files": [
  