Update scala-library to 2.12.20

Author: scala-steward

.travis.yml

@@ -19,15 +19,15 @@ matrix:
       env: COMMAND=ci-js
     # Scala 2.12, JVM
     - jdk: oraclejdk8
-      scala: 2.12.15
+      scala: 2.12.20
       env: COMMAND=ci-jvm-all
     # Scala 2.12, JVM, JDK 11
     - jdk: openjdk11
-      scala: 2.12.15
+      scala: 2.12.20
       env: COMMAND=ci-jvm
     # Scala 2.12, JavaScript
     - jdk: oraclejdk8
-      scala: 2.12.15
+      scala: 2.12.20
       env: COMMAND=ci-js
     # Scala 2.13, JVM
     - jdk: oraclejdk8

build.sbt

@@ -2,7 +2,7 @@ name := "scala-retry"
 
 organization := "com.github.hipjim"
 
-crossScalaVersions := Seq("2.10.6", "2.11.10", "2.12.15","2.13.14", "3.0.2")
+crossScalaVersions := Seq("2.10.6", "2.11.10", "2.12.20","2.13.14", "3.0.2")
 
 version := "0.5.0-SNAPSHOT"