added pull.yml to automatically update forks

.github/pull.yml

@@ -0,0 +1,12 @@
+# doc: https://github.com/wei/pull#basic-setup
+# manual trigger: https://pull.git.ci/process/${fork-user}/keepassxc
+# pull from: https://github.com/keepassxreboot/keepassxc
+version: "1"
+rules:
+  - base: master
+    upstream:  keepassxreboot:master
+    mergeMethod: hardreset
+
+  - base: develop
+    upstream:  keepassxreboot:develop
+    mergeMethod: rebase