Update scala-library to 2.12.15 (#119)

* Update scala-library to 2.12.15

* Regenerate workflow with sbt-github-actions

Author: scala-steward

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.11.12, 2.12.14, 2.13.6]
+        scala: [2.11.12, 2.12.15, 2.13.6]
         java: [[email protected]]
     runs-on: ${{ matrix.os }}
     steps:
@@ -107,12 +107,12 @@ jobs:
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.12.14)
+      - name: Download target directories (2.12.15)
         uses: actions/download-artifact@v2
         with:
-          name: target-${{ matrix.os }}-2.12.14-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.12.15-${{ matrix.java }}
 
-      - name: Inflate target directories (2.12.14)
+      - name: Inflate target directories (2.12.15)
         run: |
           tar xf targets.tar
           rm targets.tar

build.sbt

@@ -7,7 +7,7 @@ organization := "com.github.swagger-akka-http"
 
 ThisBuild / scalaVersion := "2.13.6"
 
-ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.14", "2.13.6")
+ThisBuild / crossScalaVersions := Seq("2.11.12", "2.12.15", "2.13.6")
 
 ThisBuild / organizationHomepage := Some(url("https://github.com/swagger-akka-http/swagger-scala-module"))