Point to killbill-client-ruby gem instead of GH/Fix ci error

.github/workflows/ci.yml

@@ -54,8 +54,8 @@ jobs:
       - name: Start stack
         run: |
           cd docker
-          docker-compose -p it -f ${{ matrix.docker-compose-file }} up --no-start
-          docker start it_db_1
+          docker compose -p it -f ${{ matrix.docker-compose-file }} up --no-start
+          docker start it-db-1
       - name: Wait for MySQL
         if: ${{ matrix.docker-compose-file == 'docker-compose.ci.mysql.yml' }}
         run: |
@@ -88,7 +88,7 @@ jobs:
         # Sometimes it gets stuck (if Kill Bill starts when the DB isn't ready?)
         timeout-minutes: 4
         run: |
-          docker start it_killbill_1
+          docker start it-killbill-1
           count=0
           until $(curl --connect-timeout 10 --max-time 30 --output /dev/null --silent --fail http://${KB_ADDRESS}:${KB_PORT}/1.0/healthcheck); do
             if [[ "$count" == "180" ]]; then
@@ -127,10 +127,10 @@ jobs:
           echo "[DEBUG] docker ps -a"
           docker ps -a
           echo "[DEBUG] killbill env"
-          docker exec it_killbill_1 env || true
+          docker exec it-killbill-1 env || true
           echo "[DEBUG] db env"
-          docker exec it_db_1 env || true
+          docker exec it-db-1 env || true
           echo "[DEBUG] killbill logs"
-          docker logs -t --details it_killbill_1 || true
+          docker logs -t --details it-killbill-1 || true
           echo "[DEBUG] db logs"
-          docker logs -t --details it_db_1 || true
+          docker logs -t --details it-db-1 || true

Gemfile

@@ -15,7 +15,7 @@ gemspec
 group :development do
   gem 'gem-release'
   gem 'json'
-  gem 'killbill-client', github: 'killbill/killbill-client-ruby', ref: 'master'
+  gem 'killbill-client'
   gem 'listen'
   gem 'puma'
   gem 'rake'