Update since and until correctly

Author: cedricziel

build.gradle

@@ -65,13 +65,23 @@ subprojects {
         version ideaVersion
         downloadSources !Boolean.valueOf(System.getenv('CI'))
         sameSinceUntilBuild Boolean.valueOf(isEAP)
+        updateSinceUntilBuild true
     }
 
     publishPlugin {
         username System.getenv('IJ_REPO_USERNAME')
         password System.getenv('IJ_REPO_PASSWORD')
     }
 
+    patchPluginXml {
+        if (customSinceBuild) {
+            sinceBuild customSinceBuild
+        }
+        if (customUntilBuild) {
+            untilBuild customUntilBuild
+        }
+    }
+
     grammarKit {
         grammarKitRelease = "2017.1.4"
         jflexRelease = jFlexRelease