use coursier/setup-action Github Actions (#1186)

* use setup-java on Github Actions
* use sbt cache
* try coursier instead

.github/workflows/ci.yml

@@ -11,8 +11,10 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - run: git fetch --depth=1 origin '+refs/tags/*:refs/tags/*'
-      - uses: olafurpg/setup-scala@v10
+      - uses: coursier/cache-action@v6
+      - uses: coursier/setup-action@v1
         with:
-          java-version: [email protected]
+          jvm: adopt:8
+          apps: sbt
       - name: Test
         run: sbt -v ";+core/test;+instrumentation/test;+reporters/test"

.github/workflows/release.yml

@@ -13,7 +13,11 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - run: git fetch --depth=1 origin '+refs/tags/*:refs/tags/*'
-      - uses: olafurpg/setup-scala@v10
+      - uses: coursier/cache-action@v6
+      - uses: coursier/setup-action@v1
+        with:
+          jvm: adopt:8
+          apps: sbt
       - name: Release
         run: sbt ";+instrumentation/publishLocal; release"
         shell: bash