Update scala-library to 2.12.15

Author: scala-steward

.travis.yml

@@ -6,7 +6,7 @@ language: scala
 
 scala:
   - 2.11.12
-  - 2.12.14
+  - 2.12.15
   - 2.13.6
   - 3.0.1
 
@@ -22,15 +22,15 @@ matrix:
   include:
 
     # run migration test
-    - scala: 2.12.14
+    - scala: 2.12.15
       env: TEST_SCALAFIX=true      ADOPTOPENJDK=8
 
     # run binary compatibility test
-    - scala: 2.12.14
+    - scala: 2.12.15
       env: TEST_BINARY_COMPAT=true ADOPTOPENJDK=8
 
     # run scalafmt
-    - scala: 2.12.14
+    - scala: 2.12.15
       env: TEST_SCALAFMT=true      ADOPTOPENJDK=8
 
   exclude:

build.sbt

@@ -54,7 +54,7 @@ lazy val root = project
 lazy val junit = libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test
 
 lazy val scala211 = "2.11.12"
-lazy val scala212 = "2.12.14"
+lazy val scala212 = "2.12.15"
 lazy val scala213 = "2.13.6"
 lazy val scala30  = "3.0.2"
 

project/plugins.sbt

@@ -9,5 +9,5 @@ addSbtPlugin("org.portable-scala"     % "sbt-scalajs-crossproject"      % crossV
 addSbtPlugin("org.scala-native"       % "sbt-scala-native"              % scalaNativeVersion)
 addSbtPlugin("org.portable-scala"     % "sbt-scala-native-crossproject" % crossVer)
 addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module"              % "2.4.0")
-addSbtPlugin("ch.epfl.scala"          % "sbt-scalafix"                  % "0.9.30")
+addSbtPlugin("ch.epfl.scala"          % "sbt-scalafix"                  % "0.9.31")
 addSbtPlugin("com.eed3si9n"           % "sbt-buildinfo"                 % "0.10.0")