Prepare for 0.21.0 release

Author: acogoluegnes

Diff for: .github/workflows/sanity-check.yml

@@ -4,10 +4,10 @@ on:
   workflow_dispatch:
     inputs:
       library_version:
-        description: 'Library version (e.g. 0.15.0)'
+        description: 'Library version (e.g. 0.21.0)'
         required: true
         type: string
-        default: '0.15.0'
+        default: '0.21.0'
 
 jobs:
   build:
@@ -34,4 +34,4 @@ jobs:
         env:
           RABBITMQ_LIBRARY_VERSION: ${{ inputs.library_version }}
       - name: Stop broker
-        run: docker stop rabbitmq && docker rm rabbitmq
+        run: docker stop rabbitmq && docker rm rabbitmq

Diff for: release-versions.txt

@@ -1,5 +1,5 @@
 RELEASE_VERSION="0.21.0"
-DEVELOPMENT_VERSION="0.21.0-SNAPSHOT"
+DEVELOPMENT_VERSION="0.22.0-SNAPSHOT"
 RELEASE_BRANCH="main"
 LATEST=true