* Test against `roave/you-are-using-it-wrong`
* Added CI step to ensure BC of declared API
* Added step to ensure `composer.json` has all used deps
* Including CI check tools as dev dependencies
* Typo fix: s/backwards/backward
* Run `roave/backward-compatibility-check` off an isolated location with no other dependencies
* Run `test-with-real-projects` task with PHP 7.4 as base runtime
* Run `testing-with-real-projects` also against `ocramius/proxy-manager`
`ocramius/proxy-manager` is an extremely heavy `vimeo/psalm` consumer,
and relies on a lot of the templated types system to generate real
types for proxies produced by runtime evaluation.
* Bumped phpspec/prophecy version to prevent 7.4 deprecations
* Fix DOMDocument::$config type
This property was documented as containing DOMConfiguration object, but
in fact always returned `null` (see [php source](ee80567a83/ext/dom/document.c (L542))).
DOMConfiguration class is removed in PHP 8.
* Dropped unused use
* Allow to set PHP 8.0 as current version
* Fix CallMap issues for PHP 8.0
- Use both major and minor version to load deltas
- Don't load non-existent deltas
- Stop at lowest possible delta
This should stop the error messages we are seeing on installing
psalm/phar:
Skipped installation of bin psalm for package psalm/phar: file not
found in package
Skipped installation of bin psalter for package psalm/phar: file
not found in package
Skipped installation of bin psalm-language-server for
package psalm/phar: file not found in package
Skipped installation of bin psalm-plugin for package
psalm/phar: file not found in package
They can be put back in future if/when
https://github.com/psalm/phar/issues/1 is fixed
