fix: Import blinker check (#860)

* fix: Import blinker check

* fix: linter

Author: HazAT

mypy.ini

@@ -54,7 +54,8 @@ ignore_missing_imports = True
 ignore_missing_imports = True
 [mypy-pure_eval.*]
 ignore_missing_imports = True
-
+[mypy-blinker.*]
+ignore_missing_imports = True
 [mypy-sentry_sdk._queue]
 ignore_missing_imports = True
 disallow_untyped_defs = False

sentry_sdk/integrations/flask.py

@@ -43,6 +43,10 @@
 except ImportError:
     raise DidNotEnable("Flask is not installed")
 
+try:
+    import blinker  # noqa
+except ImportError:
+    raise DidNotEnable("blinker is not installed")
 
 TRANSACTION_STYLE_VALUES = ("endpoint", "url")