Enhancement/gh 624 syntax error

[hesco]

Summary

Catch a certain syntax error, recommend an upgrade to client side puppet version => ^7
New documentation in README.md, CHANGELOG.md, and
syntax error exception caught in lib/puppet/provider/vcsrepo/cvs.rb
Provide a detailed description of all the changes present in this pull request.

Additional Context

Add any additional context about the problem here.

• Root cause and the steps to reproduce. (If applicable)

Using puppet6 on the client machine, elicits the syntax error documented at:
#624

• Thought process behind the implementation.

Related Issues (if any)

Mention any related issues or pull requests.

Checklist

• 🟢 Spec tests.
• 🟢 Acceptance tests.
• Manually verified. (For example puppet apply)

[CLAassistant]

All committers have signed the CLA.

[smortex]

#601 dropped support for Puppet 6, and was followed with a major version bump with appropriate ChangeLog entry:

puppetlabs-vcsrepo/CHANGELOG.md

Lines 25 to 30 in f1d9f4d

	## [v6.0.0](https://github.com/puppetlabs/puppetlabs-vcsrepo/tree/v6.0.0) - 2023-04-19
	[Full Changelog](https://github.com/puppetlabs/puppetlabs-vcsrepo/compare/v5.5.0...v6.0.0)
	### Changed
	- (CONT-803) Add Support for Puppet 8 / Drop Support for Puppet 6 [#601](https://github.com/puppetlabs/puppetlabs-vcsrepo/pull/601) ([david22swan](https://github.com/david22swan))

We also include metadata that indicate what version of Puppet a module version require:

puppetlabs-vcsrepo/metadata.json

Lines 76 to 81 in f1d9f4d

	"requirements": [
	{
	"name": "puppet",
	"version_requirement": ">= 7.0.0 < 9.0.0"
	}
	],

For these reasons, I am not in favor of adding extra code to give hints for such known bad configurations.

[hesco]

I had rather hoped that r10k puppetfile install would have made a lot of noise about installing a version unsupported this fundamentally in its environment.

#601 dropped support for Puppet 6, and was followed with a major version bump with appropriate ChangeLog entry:

puppetlabs-vcsrepo/CHANGELOG.md

Lines 25 to 30 in f1d9f4d

	## [v6.0.0](https://github.com/puppetlabs/puppetlabs-vcsrepo/tree/v6.0.0) - 2023-04-19
	[Full Changelog](https://github.com/puppetlabs/puppetlabs-vcsrepo/compare/v5.5.0...v6.0.0)
	### Changed
	- (CONT-803) Add Support for Puppet 8 / Drop Support for Puppet 6 [#601](https://github.com/puppetlabs/puppetlabs-vcsrepo/pull/601) ([david22swan](https://github.com/david22swan))

We also include metadata that indicate what version of Puppet a module version require:

puppetlabs-vcsrepo/metadata.json

Lines 76 to 81 in f1d9f4d

	"requirements": [
	{
	"name": "puppet",
	"version_requirement": ">= 7.0.0 < 9.0.0"
	}
	],

For these reasons, I am not in favor of adding extra code to give hints for such known bad configurations.

understood. Thank you for your consideration.