Move Codecov's configuration file under .github (GH-1494)

.github/codecov.yml

@@ -0,0 +1,29 @@
+codecov:
+  notify:
+    require_ci_to_pass: true
+comment: off
+ignore:
+  - "Doc/**/*"
+  - "Misc/*"
+  - "Mac/**/*"
+  - "PC/**/*"
+  - "PCbuild/**/*"
+  - "Tools/**/*"
+  - "Grammar/*"
+coverage:
+  precision: 2
+  range: 70...90
+  round: down
+  status:
+    changes: off
+    project: off
+    patch: off
+parsers:
+  gcov:
+    branch_detection:
+      conditional: true
+      loop: true
+      macro: false
+      method: false
+  javascript:
+    enable_partials: false