Build for Scala 2.12 and 2.13

Author: michaelmior

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
     branches:
       - main
 jobs:
-  test:
+  test-213:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
@@ -21,16 +21,26 @@ jobs:
     - name: Test
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: sbt coverage test coverageReport
+      run: sbt '++ 2.13.10' coverage test coverageReport
     - name: Upload coverage
       uses: codecov/codecov-action@v1
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         fail_ci_if_error: true
 
+  test-212:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: olafurpg/setup-scala@v10
+    - name: Test
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: sbt '++ 2.12.15' test
+
   publish:
     if: ${{ github.event_name != 'pull_request' }}
-    needs: [test]
+    needs: [test-213, test-212]
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2

build.sbt

@@ -1,6 +1,5 @@
 import Dependencies._
 
-ThisBuild / scalaVersion     := "2.13.10"
 ThisBuild / versionScheme    := Some("early-semver")
 ThisBuild / organization     := "io.github.dataunitylab"
 ThisBuild / organizationName := "Data Unity Lab"
@@ -24,6 +23,7 @@ val nonConsoleCompilerOptions = Seq(
 lazy val root = (project in file("."))
   .settings(
     name := "Fuzzy Sets",
+    crossScalaVersions := Seq("2.12.15", "2.13.10"),
     libraryDependencies += scalaTest % Test,
     scalacOptions ++= nonConsoleCompilerOptions
   )

project/plugins.sbt

@@ -4,6 +4,6 @@ addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
 addSbtPlugin("io.kevinlee" % "sbt-github-pages" % "0.7.0")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.0")
 addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "1.0.0")
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.6.1")
+addSbtPlugin("org.scoverage" %% "sbt-scoverage" % "1.6.1")
 addSbtPlugin("org.wartremover" % "sbt-wartremover" % "3.1.0")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.9.21")