Prevent installing multiple versions of @types/react (#182)

template/package.json

@@ -27,6 +27,9 @@
     "react-test-renderer": "16.13.1",
     "typescript": "^3.8.3"
   },
+  "resolutions": {
+    "@types/react": "^16"
+  },
   "jest": {
     "preset": "react-native",
     "moduleFileExtensions": [

template/tsconfig.json

@@ -4,7 +4,7 @@
     /* Basic Options */
     "target": "esnext",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "lib": ["es6"],                           /* Specify library files to be included in the compilation. */
+    "lib": ["es2017"],                        /* Specify library files to be included in the compilation. */
     "allowJs": true,                          /* Allow javascript files to be compiled. */
     // "checkJs": true,                       /* Report errors in .js files. */
     "jsx": "react-native",                    /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
@@ -45,7 +45,7 @@
     "allowSyntheticDefaultImports": true,     /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
     "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
     // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
-    "skipLibCheck": true                      /* Skip type checking of declaration files. */
+    "skipLibCheck": false                      /* Skip type checking of declaration files. */
 
     /* Source Map Options */
     // "sourceRoot": "./",                    /* Specify the location where debugger should locate TypeScript files instead of source locations. */