Merge of 0550 to dev

Prepare release 0.55.0

• Add changelog for 0.55.0
• Fix job push_to_github (tested ok with release_test see https://github.com/duniter/duniter-python-api/tree/0550)

.gitlab-ci.yml

@@ -3,7 +3,6 @@ stages:
   - test
   - build
   - release
-  - github-sync
 
 variables:
     PYENV_PYTHON_VERSION: 3.5.5
@@ -12,20 +11,22 @@ image: registry.duniter.org/docker/python3/duniterpy-builder:0.0.4
 
 # SUB-TASKS
 .push_to_github:
-  variables:
-    GIT_STRATEGY: none
   tags:
     - github
   after_script:
+    # remove all files in current repo
     - rm -rf ./*
-    - rm -rf .git
+    - rm -rf .git*
+    # do a mirror clone in current repo
     - git clone --mirror $CI_REPOSITORY_URL .
+    # do config for github push
     - git remote add github $GITHUB_URL_AND_KEY
     - git config --global user.email "contact@duniter.org"
     - git config --global user.name "Duniter"
-    # Job would fail if we don't remove refs about pull requests
-    - bash -c "cat packed-refs | grep -v 'refs/pull' > packed-refs-new; echo 'Removed pull refs.'"
+    # remove refs about merge requests
+    - bash -c "cat packed-refs | grep -v 'refs/merge-requests' > packed-refs-new; echo 'Removed merge-requests refs.'"
     - mv packed-refs-new packed-refs
+    # github push
     - bash -c "git push --force --mirror github 2>&1 | grep -v duniter-gitlab; echo $?"
 
 .pyenv: