add support for prereleases. fixes #17

CHANGELOG.md

@@ -22,6 +22,8 @@ GitHub actions inputs don't inherently support lists of things and one might lik
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
 
+* Add support for prerelease annotated GitHub releases with the new input field `with.prerelease: true`
+
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 ## 0.1.1