Change coverage defaults

Make source=src (override-able if needed), and turn on missing
line reporting

Author: bskinn

.coveragerc

@@ -1,12 +1,14 @@
 [run]
-omit =
-    # Don't cover code in the env (just in case)
-    env/*
+source =
+    src
 
+omit =
     # Don't worry about covering vendored libraries
     src/sphobjinv/_vendored/*
 
 [report]
 exclude_lines =
     pragma: no cover
     ^\s*pass\s*$
+
+show_missing = True

.github/workflows/ci_tests.yml

@@ -32,9 +32,9 @@ jobs:
         make html
         mkdir scratch
 
-    - name: Run tests
+    - name: Run tests & report source coverage
       run: |
-        pytest --cov=src --testall --nonloc
+        pytest --cov --testall --nonloc
         tox -e sdist_install
 
     - name: Run doctests
@@ -86,7 +86,7 @@ jobs:
         make html
         mkdir scratch
 
-    - name: Run tests
+    - name: Run tests & report source coverage
       run: |
-        pytest --cov=src --testall --nonloc
+        pytest --cov --testall --nonloc
         tox -e sdist_install