Introduce dependabot support

Change-Id: I561384df467ea4dd43c16202eab1411077edf879
diff --git a/.gitignore b/.gitignore
index 0f795b0..fd1ff68 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 ~*
 .*
 !.gitignore
+!/.github
 \#*
 *.info
 datok