chore: Add support for Scala 2.13.18 (#733)

Author: tgodzik

.github/workflows/ci.yml

@@ -24,6 +24,7 @@ jobs:
             { version: '2.12.18' },
             { version: '2.13.16' },
             { version: '2.13.17' },
+            { version: '2.13.18' },
           ]
     steps:
       - name: checkout the repo

build.sbt

@@ -15,6 +15,7 @@ lazy val bin212 =
   )
 lazy val bin213 =
   Seq(
+    "2.13.18",
     "2.13.17",
     defaultScala213
   )