Allow to run TypeScript (Services) in strict mode

[kpreisser]

Hi,
this is a follow-up issue to #9449.

TypeScript Version: master (4685646)

After PR #9353 has been merged, typescriptServices.js (in this case) again cannot be run in strict mode due to using the identifier package in services.ts, which is a reserved word in strict mode:

C:\Users\VPC\Desktop\TypeScript\built\local>node --use_strict typescriptServices.js
C:\Users\VPC\Desktop\TypeScript\built\local\typescriptServices.js:68849
                        var package = _d[_c];
                            ^^^^^^^
SyntaxError: Unexpected strict mode reserved word

(running current master)

As @HerringtonDarkholme noted, this causes an error in the Closure Compiler.

Now that TSC requires at least ES5 (#10125), might there be an option to add "use strict"; to the ts files of the TypeScript repo? This should prevent using such reserved identifiers.

Thanks!

[mhegazy]

I have a fix to remove the use of package in #10757. the longer term change is to add a new flag to parse a project in strict mode.

[kpreisser]

Thanks!

[mhegazy]

Filed #10758 to track adding the compiler option.