Set non-git version to 4.16.1-non-git

Airblader · Airblader · commit 341fcf9984c1 · 2019-01-27T22:11:55.000+01:00
diff --git a/I3_VERSION b/I3_VERSION
@@ -1 +1 @@
-4.16.1 (2019-01-27)
+4.16.1-non-git
