Merge pull request #714 from scala-steward/update/scalatest-3.1.2

Update scalatest to 3.1.2

Author: japgolly

project/Build.scala

@@ -32,7 +32,7 @@ object ScalajsReact {
     val ScalaCollCompat       = "2.1.6"
     val ScalaJsDom            = "1.0.0"
     val ScalaJsTime           = "1.0.0"
-    val ScalaTest             = "3.1.1"
+    val ScalaTest             = "3.1.2"
     val Scalaz72              = "7.2.30"
     val SizzleJs              = "2.3.0"
     val Sourcecode            = "0.2.1"