skip non lib files for test coverage (#28)

Author: PragTob

coveralls.json

@@ -0,0 +1,30 @@
+{
+  "default_stop_words": [
+    "defmodule",
+    "defrecord",
+    "defimpl",
+    "defexception",
+    "defprotocol",
+    "defstruct",
+    "def.+(.+\\\\.+).+do",
+    "^\\s+use\\s+"
+  ],
+
+  "custom_stop_words": [
+  ],
+
+  "coverage_options": {
+    "treat_no_relevant_lines_as_covered": false,
+    "output_dir": "cover/",
+    "minimum_coverage": 0
+  },
+
+  "terminal_options": {
+    "file_column_width": 40
+  },
+
+  "skip_files": [
+    "test/support",
+    "mix"
+  ]
+}