Adds github action to check build and test on commit to master (#278)

* Added github action for build

Author: debasishg

.github/workflows/build.yml

@@ -0,0 +1,24 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - master
+    tags: ["*"]
+
+jobs:
+  sbt:
+    name: sbt compile
+    runs-on: ubuntu-20.04
+    if: github.repository == 'debasishg/scala-redis'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set up JDK 11
+        uses: olafurpg/setup-scala@v10
+      - name: Compile and test
+        run: |-
+          sbt clean compile test
+

build.sbt

@@ -5,8 +5,8 @@ lazy val redisClient = (project in file(".")).settings(coreSettings : _*)
 lazy val commonSettings: Seq[Setting[_]] = Seq(
   organization := "net.debasishg",
   version := "3.40",
-  scalaVersion := "2.12.10",
-  crossScalaVersions := Seq("2.12.14", "2.11.12", "2.10.7", "2.13.6"),
+  scalaVersion := "2.13.6",
+  crossScalaVersions := Seq("2.12.14", "2.11.12", "2.10.7", "2.12.10"),
 
   scalacOptions in Compile ++= Seq( "-unchecked", "-feature", "-language:postfixOps", "-deprecation" ),