Release 5.0-beta (#5684)

* Update changelog for 5.0-beta

* Release v5.0-beta

* Fix Version number to 5.0.1

* Set dev to false on tag builds

* i suck...

* wertzhujiklö

* evaluate the dev property

* Fix Unreleased link in CHANGELOG.md (and fix order of link list)

* Fix release date

* Trigger build with tag

* Try ?? to get patch when releasing

* Correct release date

* Update GitVersion.yml

Author: LinusDietz

CHANGELOG.md

@@ -9,7 +9,7 @@ Here, the categories "Changed" for added and changed functionality,
 
 We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#NUM`.
 
-## [Unreleased]
+## [5.0-beta] – 2019-12-15
 
 ### Changed
 
@@ -84,52 +84,6 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 - We removed the option to control the default drag and drop behaviour. You can use the modifier keys (like CtrL or Alt) instead.
 
 
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 ## [5.0-alpha] – 2019-08-25
 
 ### Changed
@@ -284,5 +238,6 @@ The changelog of JabRef 4.x is available at the [v4.x branch](https://github.com
 The changelog of JabRef 3.x is available at the [v3.8.2 tag](https://github.com/JabRef/jabref/blob/v3.8.2/CHANGELOG.md).
 The changelog of JabRef 2.11 and all previous versions is available as [text file in the v2.11.1 tag](https://github.com/JabRef/jabref/blob/v2.11.1/CHANGELOG).
 
-[Unreleased]: https://github.com/JabRef/jabref/compare/v5.0-alpha...HEAD
+[Unreleased]: https://github.com/JabRef/jabref/compare/v5.0-beta...HEAD
+[5.0-beta]: https://github.com/JabRef/jabref/compare/v5.0-alpha...v5.0-beta
 [5.0-alpha]: https://github.com/JabRef/jabref/compare/v4.3...v5.0-alpha