Merge pull request #209 from scala-steward/update/scala-library-2.12.13

Update scala-library to 2.12.13

Author: vigoo

.travis.yml

@@ -35,7 +35,7 @@ script: |
 
 jobs:
   include:
-    - scala: 2.12.12
+    - scala: 2.12.13
     - scala: 2.13.6
     - scala: 3.0.0
     - stage: release

build.sbt

@@ -1,4 +1,4 @@
-val scala212 = "2.12.12"
+val scala212 = "2.12.13"
 val scala213 = "2.13.6"
 val scala3 = "3.0.0"