chore: update

1. remove travis
2. upgrade sbt to latest version
3. remove scala-style plugin
4. upgrade sbt scoverage to latest version
5. update scala version to 2.13.16

Author: counter2015

.travis.yml

@@ -5,7 +5,7 @@ organization := "com.counter2015"
 version := "1.0"
 
 // same version to leetcode.com
-scalaVersion := "2.13.10"
+scalaVersion := "2.13.16"
 
 
 libraryDependencies ++= Seq(

build.sbt

@@ -1 +1 @@
-sbt.version=1.9.9
+sbt.version=1.10.11

project/build.properties

@@ -1,2 +1 @@
-addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "1.0.0")
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.6.1")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.3.1")