feat: Add support for TypeScript project references (#991)

* Update all package.json and tsconfig.json

* fix(contracts): Make test/utils/web3_wrapper.ts compatible with project refs

* Fix webpack config for 0x.js

* Fix linter errors by adding rootDir to tsconfig.json as needed

* Add build:ts and watch:ts commands to package.json

* Update sra-spec to work with project references

* Update tsconfig.json with latest new/removed packages

* Add TypeScript as devDependency at root

* Add missing rootDir to forwarder-helper package

* Use a separate tsconfig file for typedoc

* Fix linter errors

* Apply PR feedback (add comments)

* Fix 0x.js tsconfig

packages/react-shared/tsconfig.json

@@ -1,9 +1,10 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "./lib/",
+        "outDir": "lib",
+        "rootDir": "src",
         "jsx": "react",
-        "baseUrl": "./",
+        "baseUrl": ".",
         "paths": {
             "*": ["node_modules/@types/*", "*"]
         }