Merge branch 'dev'

FIX: fix pypitest gitlab action: use conda-forge channel

Update CHANGELOG.md

Remove invalid pypi URL, it was the testpypi url.

Merge pull request #398 from esi-neuroscience/dev

Last minute update

Update .gitlab-ci.yml file

Bugfixes and features additions for `EventData` objects.

- Added support for flexible columns in `EventData` (thanks to @KatharineShapcott)

- Include specific example how to create an "all-to-all" `trialdefinition` array
  by invoking `definetrial` without arguments in the function's docstring.
- Modified versioning scheme: use a date-based scheme instead of increasing
  version numbers
- Aligned padding API to FieldTrip in both `freqanalysis` and `connectivityanalysis`:
  use `pad` instead of `pad_to_length` with three supported modes ('maxperlen',
  float, 'nextpow2').

- Removed support for calling `freqanalysis` with a `toi` array as well as an
  input dataset that has an active in-place time-selection attached

- Improved legibility of `spy.__version__` for non-release installations
- Correctly process equidistant `toi` arrays with large spacing in `freqanalysis`
- Corrected `trialtime` for `DiscreteData` objects (thanks to @KatharineShapcott)

Merge branch 'dev' into master

Merge branch 'dev'

FIX: More GitLab CI fixes

- corrected URL of PyPI-Test in GitLab CI setup
- set environment variable `GIT_FETCH_EXTRA_FLAGS: --tags` to pull git tags
  from remote, so that package version is inferred correctly
- do not use `__name__` in package __init__.py to get version from
  site-packages; SyNCoPy's PyPI name is "esi-syncopy", thus, querying for
  "syncopy" in site-packages does not yield anything

On branch master
Changes to be committed:
	modified:   .gitlab-ci.yml
	modified:   CITATION.cff
	modified:   syncopy/__init__.py