This aligns options that do the same thing:
1) `skipSpecs` and `spec` has been deprecated in favor of `skipTests`.
2) `styleext` has been deprecated in favor of `style` since the latest is two words.
Fixes#12784
* fix(@schematics/angular): --minimal should prevent generating e2e
Don't run the e2e schematic when using application or ng-new schematics
with option.minimal set to true.
fix#12739
* style: inverse logic according to feedback
* test(@schematics/angular): app and ng-new --minimal shouldn't generate e2e
This should clean up the code a bit.
Note: at first I added the no-useless-cast rule, but after getting frustrated
with it (as it has many false positive), I decided to remove the rule but some
useless casts were removed so I let those in the PR.
