Summary hash uses wrong key names #82

Dynamically generated rulesets are not applied on diffs #81

These test cases resemble the use cases how the regression tester is used in the main PMD repo.
...

As documented in History.md, the keys of the hash returned by Runner must be symbols,
e.g.

summ...

The filter was correctly determined and used when the PMD report
has been created. That resulted...

CVE-2020-26247
https://github.com/advisories/GHSA-vr8q-g5c7-m54m

Better html reports #78

Cache and reuse pmd builds #80

This is important for speeding up CI builds to avoid rebuilding PMD.

The full distro_path looks now like
<cwd>/pmd-bin-<version>-<branch>-<sha>

Now we cache builds for specific shas.
This avoids the cache where eg we test
pmd/7.0.x against ...

In case the branch name was a tag, the tag sha was used instead of
the commit sha, which rebuilt...

In case the branch name was a tag, the tag sha was used instead of
the commit sha, which rebuilt...

Add new configuration option "--baseline-download-url" #79

Integration tests pass locally so I don't
know what the ci is doing differently

Also fix a depr...

Speedup XML parsing #76

Add new option "--error-recovery" #75

rraaaa

Calling every method 'build' is really bad style...

GEM_HOST_API_KEY needs to be exported, so that it is
available for "gem push".

This reverts commit a5d0fc9e4415758aae89cce72f1699f323e461ca.

Also make the data flow more explicit here