Update sbt-scalajs, scalajs-compiler, ... to 1.5.0 (#425)

Author: scala-steward

.travis.yml

@@ -13,10 +13,10 @@ scala:
 
 env:
   - SCALAJS_VERSION=          ADOPTOPENJDK=8
-  - SCALAJS_VERSION=1.4.0     ADOPTOPENJDK=8
+  - SCALAJS_VERSION=1.5.0     ADOPTOPENJDK=8
   - SCALANATIVE_VERSION=0.4.0 ADOPTOPENJDK=8
   - SCALAJS_VERSION=          ADOPTOPENJDK=11
-  - SCALAJS_VERSION=1.4.0     ADOPTOPENJDK=11
+  - SCALAJS_VERSION=1.5.0     ADOPTOPENJDK=11
   - SCALANATIVE_VERSION=0.4.0 ADOPTOPENJDK=11
 
 matrix:

project/plugins.sbt

@@ -1,6 +1,6 @@
 val crossVer = "1.0.0"
 val scalaJSVersion =
-  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("1.4.0")
+  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("1.5.0")
 val scalaNativeVersion =
   Option(System.getenv("SCALANATIVE_VERSION")).filter(_.nonEmpty).getOrElse("0.4.0")