TS 2.7-- Add new flags

[mhegazy]

New flag --strictPropertyInitialization:

• Add to MSBuild targets
• Add to compiler options documentation and MSBuild documentation
• Update schema store

New flag --ESModuleInterop

• Add to MSBuild targets
• Add to compiler options documentation and MSBuild documentation
• Update schema store

New --target ES2018

• new library file es2018
• new library files esNext.array and esNext.promise