Use strict compiler options in TypeScript template
Use strict compiler options in TypeScript template

These improve the type-safety of TypeScript projects to a good degree.
"strictNullChecks" was not enabled since it may not work reliably with
other libraries.

Change-Id: Ic94913497dd6adb789eb51b2e921f6a88baba404

eclipsesource/generator-tabris-js,eclipsesource/generator-tabris-js