tests: Exclude mypy-specific code from coverage

l0b0 · l0b0 · commit 1fd4c4bbe4d4 · 2021-06-29T15:41:13.000+12:00
diff --git a/.coveragerc b/.coveragerc
@@ -1,5 +1,8 @@
 [report]
 fail_under = 91
+exclude_lines =
+    if TYPE_CHECKING:
+
 
 [run]
 source = pystac
