MNT: Merge .coveragerc into setup.cfg

Author: kernc

Diff for: .coveragerc

@@ -5,3 +5,21 @@ max-line-length = 100
 warn_unused_ignores = True
 warn_redundant_casts = True
 ignore_missing_imports = True
+
+[coverage:run]
+parallel = 1
+concurrency =
+    multiprocessing
+source =
+    backtesting
+    doc/examples
+omit =
+
+[coverage:report]
+exclude_lines =
+    ^\s*continue\b
+    ^\s*return\b
+    ^\s*raise\b
+    ^\s*except\b
+    ^\s*warnings\.warn\(
+    ^\s*warn\(