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Latest @microsoft/botframework-cli@next

Describe the bug

1. Escape brackets in nested entity definition not work.
2. Equal sign as entity value not work

To Reproduce

Steps to reproduce the behavior:

1. use luis convert to convert below lu content

# BoldIntent
- {@Command={@Action={@BoldAction=bold}} \{{@ActionTargetPhrase=directions from seattle to portland}\}},
- {@Command={@Action={@BoldAction=emphasise from}} {@ActionTargetRange={@ActionTargetStart=@username {@ActionTargetSeparator=through} {@ActionTargetEnd==}}}

2. You will see exceptions

Expected behavior

Should escape brackets and recognize equal sign as entity value successfully

Screenshots

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Additional context

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[bug]