Update base tsconfig.json to disable all compiler options except type checking

[rochdev]

As previously discussed, TypeScript compilation supports many compilation features to alter code depending on the ECMAScript and environment targets. This is problematic since many different targets must be supported with a single build output. It also makes testing much more difficult since in some cases it may make a specific language construct completely unavailable.

Any feature not related to types should be disabled. If shims are needed, they should be manually imported and used depending on specific conditions.

[vmarchaud]

I believe this one has been fixed with #34

[mayurkale22]

Closed via #34