fix(schematics): support workspaces which use targets alias

[JamesHenry]

Fixes #403

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@a24a254). Click here to learn what that means.
The diff coverage is 50.00%.

@@            Coverage Diff            @@
##             master     #424   +/-   ##
=========================================
  Coverage          ?   65.65%           
=========================================
  Files             ?       14           
  Lines             ?      591           
  Branches          ?      113           
=========================================
  Hits              ?      388           
  Misses            ?      153           
  Partials          ?       50           

Impacted Files	Coverage Δ
packages/schematics/src/utils.ts	73.17% <50.00%> (ø)

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit 580062a. Click to see the status, the terminal output, and the build insights.

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Status	Command
	nx run-many --target=build --all --parallel
	nx run-many --target=check-configs --all --parallel
	nx run-many --target=test --all --parallel
	nx run-many --target=typecheck --all --parallel

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