add rake to gemfile

.travis.yml

@@ -31,9 +31,7 @@ jobs:
     services: docker
     env: STACK=cedar-14
     script: "./tests.sh"
-  - stage: Stack Tests
-    services: docker
-    env: STACK=heroku-16
+  - stage: Hatchet Integration
     script: "rspec"
 env:
   global:

Gemfile

@@ -2,4 +2,5 @@ source "https://rubygems.org"
 
 gem "rspec"
 gem "heroku_hatchet"
-gem 'rspec-retry'
+gem "rspec-retry"
+gem "rake"

Gemfile.lock

@@ -33,6 +33,7 @@ GEM
     platform-api (2.1.0)
       heroics (~> 0.0.23)
       moneta (~> 0.8.1)
+    rake (12.3.1)
     repl_runner (0.0.3)
       activesupport
     rrrretry (1.0.0)
@@ -62,8 +63,9 @@ PLATFORMS
 
 DEPENDENCIES
   heroku_hatchet
+  rake
   rspec
   rspec-retry
 
 BUNDLED WITH
-   1.16.2
+   1.16.3