Support to different token providers

As part of #99, cachet-url-monitor now supports different token providers. It included refactoring, so it can be easily extended to support new sources.

Still backwards compatible with old configuration files.

Improvements

Thank you @nijel for the great new additions!

• Removing unused token from Configuration.
• Adding support to webhooks.
• Improving incident handling with customizable incident message.

Numerous bug fixes

Thanks to @nijel, we got numerous bug fixes:

• Removing usage of scheduler and relying on thread sleep.
• Incorrect location of latency unit.
• Fixing the metrics push that was pushing it twice.

Major bug fix

Accidentally introduced a bug when moving code from configuration.py to scheduler.py (#81). Kindly fixed by @chris-str-cst through #82.

Major bug fix

Fixing bug introduced in 0.6.2 when a CachetClient class was created and it was preventing it from updating component status. It wasn't calling ComponentStatus.value.

Upgrading dependencies

Upgrading dependencies:

• PyYAML 5.3

Dev requirements:

• coverage 5.0.3
• coveralls 1.10.0
• mock 3.0.5
• pytest 5.3.3

And finally fixing the code coverage metrics, that was broken due to running pytest with the installed package, rather than the source code.

Automatically scraping CachetHQ configuration

Adding the ability to scrape a CachetHQ instance to automatically produce a configuration file.

Improving expectation validation

Improving expectation validation from the configuration file.

Multiple URL support

Now cachet-url-monitor supports multiple URLs under the same instance (#66) thanks to @aberenshtein implementation.

0.5

Adding the ability to override the incident status for each expectation. Feature request (#72)