Bump scala version (#5)

Author: kellydavid

.travis.yml

@@ -1,8 +1,8 @@
 language: scala
 
 scala:
- - 2.12.10
- - 2.13.1
+ - 2.12.13
+ - 2.13.4
 
 before_install:
  - git fetch --tags

build.sbt

@@ -1,5 +1,5 @@
-lazy val Scala212Version = "2.12.10"
-lazy val Scala213Version = "2.13.1"
+lazy val Scala212Version = "2.12.13"
+lazy val Scala213Version = "2.13.4"
 
 def scalacVersionOptions(scalaVersion: String) =
  CrossVersion.partialVersion(scalaVersion) match {

project/build.properties

@@ -1 +1 @@
-sbt.version=1.4.3
+sbt.version=1.4.7