chore: bump version and update CHANGELOG.md

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.1] - 2020-09-17
+### Changed
+* Switched to forks of `cobra`, `viper`, and `pflag` so that depending packages don't require `replace` directives in their go.mod
+
 ## [0.5.0] - 2020-09-03
 ### Fixed
 * Bug in scheme update mechanism leading to `UNKNOWN_PUBLIC_KEY` errors when new public keys have been added to the scheme
@@ -110,6 +114,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Combined issuance-disclosure requests with two schemes one of which has a keyshare server now work as expected
 - Various other bugfixes
 
+[0.5.1]: https://github.com/privacybydesign/irmago/compare/v0.5.0...v0.5.1
 [0.5.0]: https://github.com/privacybydesign/irmago/compare/v0.5.0-rc.5...v0.5.0
 [0.5.0-rc.5]: https://github.com/privacybydesign/irmago/compare/v0.5.0-rc.4...v0.5.0-rc.5
 [0.5.0-rc.4]: https://github.com/privacybydesign/irmago/compare/v0.5.0-rc.3...v0.5.0-rc.4

version.go

@@ -5,4 +5,4 @@
 package irma
 
 // Version of the IRMA command line and libraries
-const Version = "0.5.0"
+const Version = "0.5.1"