Update scala-library to 2.13.8 (#107)

Author: scala-steward

build.sbt

@@ -38,7 +38,7 @@ lazy val bindings = project
   .settings(commonSettings: _*)
   .settings(
     name := "scala-js-chrome",
-    crossScalaVersions := Seq("2.12.15", "2.13.7"),
+    crossScalaVersions := Seq("2.12.15", "2.13.8"),
     libraryDependencies ++= Seq(
       "org.scala-js" %%% "scalajs-dom" % "2.1.0"
     ),

examples/build.sbt

@@ -14,7 +14,7 @@ lazy val exampleApp = project
   .settings(
     name := "Example App",
     version := "0.1.0",
-    scalaVersion := "2.13.7",
+    scalaVersion := "2.13.8",
     scalacOptions ++= Seq(
       "-language:implicitConversions",
       "-language:existentials",
@@ -77,7 +77,7 @@ lazy val extension = project
   .settings(
     name := "Example Extension",
     version := "0.1.0",
-    scalaVersion := "2.13.7",
+    scalaVersion := "2.13.8",
     scalacOptions ++= Seq(
       "-language:implicitConversions",
       "-language:existentials",