Merge pull request #937 from pulsar-edit/Cirrus-gem-dependencies-fix

Cirrus: Install older dotenv gem version ~> 2.8 (< 3)

Author: confused-Techie

.cirrus.yml

@@ -85,6 +85,7 @@ arm_linux_task:
                 libasound2-dev
                 libnss3
                 xvfb
+    - gem install dotenv -v '~>  2.8'
     - gem install fpm
     - git submodule init
     - git submodule update