misc: 1.2.0-arduino Release

[sleepdefic1t]

Proposed changes

This PR is the 1.2.0-arduino release, and matches changes up to Cpp-Client 1.2.0 master.
reference: #79

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (improve a current implementation without adding a new feature or fixing a bug)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Build (changes that affect the build system)
• Docs (documentation only changes)
• Test (adding missing tests or fixing existing tests)
• Other... Please describe:

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[ghost]

@air1one @faustbrian - please review this in the next few days. Be sure to explicitly select labels so I know what's going on.

If no reviewer appears after a week, a reminder will be sent out.

[ghost]

@sleepdefic1t The ci/circleci: build-linux-clang-5 job is failing as of f97ce602547c1a842ab54b9ef835dffecc16aaa2. Please review the logs for more information.

Once you've pushed the fixes, the build will automatically re-run. Thanks!

[ghost]

@sleepdefic1t The ci/circleci: build-linux-default job is failing as of f97ce602547c1a842ab54b9ef835dffecc16aaa2. Please review the logs for more information.

Once you've pushed the fixes, the build will automatically re-run. Thanks!

[sleepdefic1t]

@faustbrian will push a few updates, and notify you when ready.

[sleepdefic1t]

@faustbrian Ready to go 👍