Make default tsconfig.json stricter

Author: fwouts

internal/ts_library/default_tsconfig.json

@@ -5,6 +5,12 @@
  "moduleResolution": "node",
  "declaration": true,
  "strict": true,
+ "noImplicitAny": true,
+ "strictNullChecks": true,
+ "strictFunctionTypes": true,
+ "strictPropertyInitialization": true,
+ "noImplicitThis": true,
+ "alwaysStrict": true,
  "jsx": "react",
  "allowSyntheticDefaultImports": true
  }