Add PromiseKit dependency

- Added PromiseKit dependency

Carthage/Checkouts/PromiseKit/.github/codecov.yml

@@ -0,0 +1,29 @@
+ignore:
+  - "Tests"
+  - "README.md"
+  - "Documentation"
+  - ".travis.yml"
+
+codecov:
+  notify:
+    require_ci_to_pass: yes
+
+coverage:
+  precision: 1
+  round: up
+  range: "70...100"
+
+  status:
+    project: yes
+    patch: yes
+    changes: no
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment: off