Update Tests Workflow

.github/workflows/tests.yml

@@ -9,13 +9,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install Shell Mock
-      run: |
-        git clone https://github.com/capitalone/bash_shell_mock
-        cd bash_shell_mock
-        sudo ./install.sh /usr/local
-
-    - name: Install BATS
+    - name: Install testing dependencies
       run: yarn install
 
     - name: Run Tests