fix(template-parser): add BindingPipe exp to VisitorKeys (#337)

[detljh]

Added BindingPipe: ['exp'] to template-parser for (#337)

[nx-cloud]

Nx Cloud Report

CI ran the following commands for commit b496244. Click to see the status, the terminal output, and the build insights.

Status	Command	Start Time
	nx run-many --target=build --all --parallel	2/12/2021, 6:53:52 AM
	nx run-many --target=check-configs --all --parallel	2/12/2021, 6:54:57 AM
	nx run-many --target=test --all --parallel	2/12/2021, 6:54:03 AM
	nx run-many --target=typecheck --all --parallel	2/12/2021, 6:54:14 AM

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[JamesHenry]

Thanks! Please also add some relevant test coverage in the template plugin which captures the source you initially discovered this issue on

[detljh]

Sorry I'm not sure where I would add relevant tests

[JamesHenry]

@detljh You reference tests from this repo in your original bug report - I'm simply referring to have an example of what was missing before and how you originally found this

[detljh]

Oh in my original bug report those tests weren't from this repo. I found the bug while creating tests for a rule I wrote

[JamesHenry]

@detljh Ah ok, well yeah I think we currently don't have anything in this repo which is affected by this, but I agree it makes sense to have, so I'm going to merge it