convert to typescript - react-router upgrade to 4

tsconfig.json

@@ -0,0 +1,38 @@
+{
+  "compilerOptions": {
+    "target": "es2015",
+    "module": "es2015",
+    "moduleResolution": "node",
+    "jsx": "react",
+    "allowSyntheticDefaultImports": true,
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "strictNullChecks": true,
+    "preserveConstEnums": true,
+    "allowJs": false,
+    "sourceMap": true,
+    "noImplicitReturns": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
+    "alwaysStrict": true,
+    "typeRoots": [
+      "./node_modules/@types",
+      "./@types"
+    ]
+  },
+  "filesGlob": [
+    "typings/index.d.ts",
+    "src/**/*.ts",
+    "src/**/*.tsx"
+  ],
+  "include": [
+    "app"
+  ],
+  "exclude": [
+    "android",
+    "ios",
+    "build",
+    "node_modules"
+  ],
+  "compileOnSave": false
+}