Add syntax support when using heredoc

[ApsOps]

[alexlouden]

Good idea, thanks for the suggestion! I'll add it to the list.

[alexlouden]

See screenshot:

[alexlouden]

Just made a release: https://github.com/alexlouden/Terraform.tmLanguage/releases/tag/0.11.0

[ApsOps]

Works as expected. Thanks!