Bump common to 0.4.0 (#10)

Author: maciejmalecki

build.gradle

@@ -29,7 +29,7 @@ retroProject {
     dialectVersion = "5.25"
     libDirs = [".ra/deps/c64lib"]
 
-    libFromGitHub "c64lib/common", "0.3.0"
+    libFromGitHub "c64lib/common", "0.4.0"
     libFromGitHub "c64lib/64spec", "0.7.0pr"
 }