[MNT] Update codecov config

Author: xuyxu

.codecov.yml

@@ -0,0 +1,17 @@
+# PR status check
+coverage:
+  status:
+    project:
+      default:
+        # treshold: 1%
+        informational: true
+    patch:
+      default:
+        informational: true
+
+# post coverage report as comment on PR
+comment: false
+
+# enable codecov to report to GitHub status checks
+github_checks:
+  annotations: false

.coveragerc

@@ -0,0 +1,13 @@
+[report]
+show_missing = True
+
+[run]
+plugins = Cython.Coverage
+include = */deepforest/*
+omit =
+    */setup.py
+	*/deepforest/setup.py
+	*/deepforest/tree/setup.py
+	*/deepforest/__init__.py
+	*/deepforest/tree/__init__.py
+    */deepforest/tests/*