Fix CI

Author: cabol

.github/workflows/ci.yml

@@ -19,6 +19,7 @@ jobs:
           - elixir: 1.11.x
             otp: 23.x
             coverage: true
+            dialyzer: true
           - elixir: 1.10.x
             otp: 23.x
           - elixir: 1.10.x
@@ -35,10 +36,11 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install OTP and Elixir
-        uses: actions/setup-elixir@v1
+        uses: actions/setup-elixir@v1.5.0
         with:
           otp-version: '${{ matrix.otp }}'
           elixir-version: '${{ matrix.elixir }}'
+          experimental-otp: true
 
       - name: Cache deps
         uses: actions/cache@v1
@@ -89,11 +91,12 @@ jobs:
         uses: actions/cache@v1
         with:
           path: priv/plts
-          key: '${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt-v1'
+          key: '${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt-v2'
           restore-keys: |
-            ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt-v1
+            ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plt-v2
 
       - name: Run static analysis checks
         run: |
           mix sobelow --exit --skip
           mix dialyzer --format short
+        if: ${{matrix.dialyzer}}