Prepare release for phoenix 0.22.0

changelog/unreleased/update-phoenix-0.22.0

@@ -0,0 +1,8 @@
+Change: Update phoenix to v0.22.0
+
+Tags: web
+
+We updated phoenix to v0.22.0. Please refer to the changelog (linked) for details on the phoenix release.
+
+https://github.com/owncloud/ocis/pull/757
+https://github.com/owncloud/phoenix/releases/tag/v0.22.0

ocis-phoenix/Makefile

@@ -3,7 +3,7 @@ NAME := ocis-phoenix
 IMPORT := github.com/owncloud/ocis/$(NAME)
 BIN := bin
 DIST := dist
-PHOENIX_ASSETS_VERSION = v0.21.0
+PHOENIX_ASSETS_VERSION = v0.22.0
 
 ifeq ($(OS), Windows_NT)
 	EXECUTABLE := $(NAME).exe