Update Scala 3.0.0-RC3 -> 3.0.0

Also updates Scalatest 3.2.8 -> 3.2.9

Author: Sorixelle

.travis.yml

@@ -6,7 +6,7 @@ scala:
   - 2.11.12
   - 2.12.13
   - 2.13.5
-  - 3.0.0-RC3
+  - 3.0.0
 env:
   - ADOPTOPENJDK=8
   - ADOPTOPENJDK=11

project/Dependencies.scala

@@ -2,8 +2,8 @@ import sbt._
 
 object Version {
   val logback   = "1.2.3"
-  val mockito   = "3.2.8.0"
-  val scalaTest = "3.2.8"
+  val mockito   = "3.2.9.0"
+  val scalaTest = "3.2.9"
   val slf4j     = "1.7.30"
 }