Allow anyone to tag/untag/close issues.

This is (usually) reserved to people having commit right.
I'm hopping to foster participation by giving people the ability to
triage issue.

.meeseeksdev.yml

@@ -0,0 +1,17 b''
+special:
+  everyone:
+    can: 
+      - say
+      - tag
+      - untag
+      - close
+    config:
+      tag:
+        only:
+           - async/await
+           - backported
+           - help wanted
+           - documentation
+           - notebook
+           - tab-completion
+           - windows