Enable TS strict mode in all templates and generally clean up TS references

templates/ReactSpa/ClientApp/components/Counter.tsx

@@ -1,10 +1,11 @@
 import * as React from 'react';
+import { RouteComponentProps } from 'react-router';
 
 interface CounterState {
     currentCount: number;
 }
 
-export class Counter extends React.Component<{}, CounterState> {
+export class Counter extends React.Component<RouteComponentProps<{}>, CounterState> {
     constructor() {
         super();
         this.state = { currentCount: 0 };

templates/ReactSpa/ClientApp/components/FetchData.tsx

@@ -1,4 +1,5 @@
 import * as React from 'react';
+import { RouteComponentProps } from 'react-router';
 import 'isomorphic-fetch';
 
 interface FetchDataExampleState {
@@ -6,7 +7,7 @@ interface FetchDataExampleState {
     loading: boolean;
 }
 
-export class FetchData extends React.Component<{}, FetchDataExampleState> {
+export class FetchData extends React.Component<RouteComponentProps<{}>, FetchDataExampleState> {
     constructor() {
         super();
         this.state = { forecasts: [], loading: true };

templates/ReactSpa/ClientApp/components/Home.tsx

@@ -1,6 +1,7 @@
 import * as React from 'react';
+import { RouteComponentProps } from 'react-router';
 
-export class Home extends React.Component<{}, {}> {
+export class Home extends React.Component<RouteComponentProps<{}>, {}> {
     public render() {
         return <div>
             <h1>Hello, world!</h1>

templates/ReactSpa/tsconfig.json

@@ -1,18 +1,14 @@
 {
   "compilerOptions": {
     "baseUrl": ".",
+    "module": "es2015",
     "moduleResolution": "node",
     "target": "es5",
     "jsx": "react",
     "sourceMap": true,
     "skipDefaultLibCheck": true,
-    "types": [ "webpack-env" ],
-    "paths": {
-      // Fix "Duplicate identifier" errors caused by multiple dependencies fetching their own copies of type definitions.
-      // We tell TypeScript which type definitions module to treat as the canonical one (instead of combining all of them).
-      "history": ["./node_modules/@types/history/index"],
-      "react": ["./node_modules/@types/react/index"]
-    }
+    "strict": true,
+    "types": ["webpack-env"]
   },
   "exclude": [
       "bin",