Gwsumm

Point release to publish a workaround for zero length trigger files not being able to combine using `EventTable.read()`

For a full record of changes relative to the release, see https://github.com/gwpy/gwsumm/compare/2.1.2..2.1.3.

Point release to fix a bug, changing from `glue.datafind` to `gwdatafind`

For a full record of changes relative to the release, see https://github.com/gwpy/gwsumm/compare/2.1.1..2.1.2.

Minor release that updates or fixes the following:
- updated gwdatafind for new interface
- updated ligo-lw interface to use python-ligo-lw
- handle new glitchgram scatter interface
- fix title overlap in glitchgrams
- use try-except when reading HDF5 files
- bump gwbootstrap
- minor fixes when no tabs or html section given
- gps intervals now output to a gps directory instead of creating the gps interval in the base directory (this is now the same as day, week, month modes)
- fix pcolormesh calls in recent matplotlib versions
- migrated CI to github actions
- updated RTD config
- fixed flake8 failures
- improved docs

For a full record of changes relative to the release, see https://github.com/gwpy/gwsumm/compare/2.1.0..2.1.1.

Minor revision to update the Fscan html pages to display some plots at the top of the page.

For a full record of changes relative to the release, see https://github.com/gwpy/gwsumm/compare/2.0.1..2.1.0.

Bugfixes for production code, including:

* Launch python modules to Condor (325)
* Use `shutil` to copy and move files (0b2adbe)

For a full record of changes relative to the release, see https://github.com/gwpy/gwsumm/compare/2.0.0..2.0.1.

Major release of GWSumm for coverage and modularity, including:

* Require gwdetchar-2.0.0 and upgrade CSS+JS libraries (323)
* Refactor and reformat bash scripts as entry points (319)
* Implement unit test for `gwsumm.batch` (321)
* Implement unit tests for `gwsumm.plot.{guardian, triggers}` (320)
* Assorted command-line and unit test enhancements (322)
* Support Python >= 3.6 with build-and-test (318)
* Adjust normalization of pie charts (315)

For a full record of changes relative to the release, see https://github.com/gwpy/gwsumm/compare/1.0.3..2.0.0.