make version a function, not class

buildSrc/src/main/kotlin/com/dfsek/terra/CommonConfig.kt

@@ -19,3 +19,11 @@ fun Project.gitClone(name: String) {
         standardOutput = stdout
     }
 }
+
+fun Project.version(major: String, minor: String, revision: String, preRelease: Boolean = false): String {
+    return if (!preRelease)
+        "$major.$minor.$revision"
+    else //Only use git hash if it's a prerelease.
+        "$major.$minor.$revision-BETA+${getGitHash()}"
+}
+