Properly filter release/prerelease actions (#106)

* Properly filter release/prerelease actions

* Update pythonpublish.yaml

.github/workflows/pythonpublish.yaml

@@ -2,10 +2,7 @@ name: Build and Upload xarrayutils to PyPI
 on:
  release:
  types:
- - published
- push:
- tags:
- - 'v*rc*' # only trigger this for dev releases (which I currently call release candidates...
+ - published #this will be triggered by any kind of release. Pre releases are uploaded to testpypi and real releases to pypi
 
 jobs:
  build-artifacts:
@@ -51,6 +48,7 @@ jobs:
 
  test-built-dist:
  needs: build-artifacts
+ if: github.event.release.prerelease
  runs-on: ubuntu-latest
  steps:
  - uses: actions/setup-python@v2
@@ -89,7 +87,7 @@ jobs:
  python -c "import xarrayutils;print(xarrayutils.__version__)"
  upload-to-pypi:
  needs: test-built-dist
- if: github.event_name == 'release'
+ if: "!github.event.release.prerelease"
  runs-on: ubuntu-latest
  steps:
  - uses: actions/download-artifact@v2