fix: taskRnvHelp task

[mmehtonen-24i]

Description

This pr fixes rnv help command. This command currently throws a runtime failure as .getTasks() does not exist on engine data structure.

Note: it seems that unit tests at packages/rnv/__tests__/unitTests/cli.test.js are broken as all of them seem to give false positives. This is the reason why I didn't back this fix with tests. As for fixing those tests, I feel it would require a vast knowledge about internals of ReNative so I didn't attempt to do that.

Breaking Changes

• PRs should not introduce breaking changes to existing functionality
• if breaking change cannot be avoided it has to be introduced in 2 phases (release cycles of 0.x.0)
  • 0.x.0 Add new functionality + add DEPRECATED warning to existing fuctionality
  • 0.[x+1].0 Remove deprecated functionality

I have tested my changes on:

ReNative project directly:

• ios simulator
• ios device
• android simulator
• android device
• web browser
• web -e next browser
• tvos simulator
• tvos device
• androidtv simulator
• androidtv device
• androidwear simulator
• androidwear device
• tizen simulator
• tizen device
• tizenmobile simulator
• tizenwatch device
• webos simulator
• webos device
• macos
• windows
• chromecast device