fix(django): Fix django legacy url resolver regex substitution (#1272)

* fix(django): Fix django legacy url resolver regex substitution

Upstream django CVE fix caused master tests to fail.
This patches our url resolver regex substition to account for \A and \Z
metacharacters.
django/django@2.2.24...2.2.25#diff-ecd72d5e5c6a5496735ace4b936d519f89699baff8d932b908de0b598c58f662L233

Author: sl0thentr0py

CHANGELOG.md

@@ -22,6 +22,8 @@ A major release `N` implies the previous release `N-1` will no longer receive up
 
 ## Unreleased
 
+- Fix django legacy url resolver regex substitution due to upstream CVE-2021-44420 fix #1272
+
 ## 1.5.0
 
 - Also record client outcomes for before send #1211

sentry_sdk/integrations/django/transactions.py

@@ -76,6 +76,8 @@ def _simplify(self, pattern):
             result.replace("^", "")
             .replace("$", "")
             .replace("?", "")
+            .replace("\\A", "")
+            .replace("\\Z", "")
             .replace("//", "/")
             .replace("\\", "")
         )

tox.ini

@@ -114,6 +114,7 @@ deps =
     django-2.2: Django>=2.2,<2.3
     django-3.0: Django>=3.0,<3.1
     django-3.1: Django>=3.1,<3.2
+    django-3.2: Django>=3.1,<3.3
 
     flask: flask-login
     flask-0.10: Flask>=0.10,<0.11