Allowing jest to ingest typescript files

[krainboltgreene]

Includes #13 #12 #16 #15.

𝑓 npm run test

> css-in-js-generator@0.3.0 test /Users/krainboltgreene/Code/krainboltgreene/CSS-in-JS-generator
> jest

 PASS  lib/__tests__/convertCssForEmotion.test.js
 PASS  lib/__tests__/getNodeScopes.test.js
 PASS  lib/__tests__/getRequiredScopes.test.js
 PASS  lib/__tests__/getCssIndexedByScope.test.js
 PASS  lib/__tests__/convertScopedCssForEmotion.test.js
 PASS  lib/__tests__/convertSelectorForEmotion.test.js
 PASS  lib/__tests__/getSelectorScope.test.js
 PASS  lib/__tests__/convertScopeToModuleName.test.js
 PASS  lib/__tests__/escapeScopedCss.test.js

Test Suites: 9 passed, 9 total
Tests:       9 passed, 9 total
Snapshots:   0 total
Time:        1.006s
Ran all test suites