chore: set werkzeug max version for flask 1.0.x (#3493) (#3499)

While Flask 1.1.x release included a maximum version for werkzeug, the 1.0.x branch did not:

- 1.0.x: https://github.com/pallets/flask/blob/d92b64aa275841b0c9aea3903aba72fbc4275d91/setup.py#L53
- 1.1.x: https://github.com/pallets/flask/blob/1ca199f9b38b70a4e97cb47a4252ffd7fccc008c/setup.py#L56

(cherry picked from commit 45f6214)

Co-authored-by: Tahir H. Butt <[email protected]>

Author: mergify[bot]

riotfile.py

@@ -766,6 +766,8 @@ def select_pys(min_version=MIN_PYTHON_VERSION, max_version=MAX_PYTHON_VERSION):
                         # https://github.com/pallets/markupsafe/issues/282
                         # DEV: Breaking change made in 2.1.0 release
                         "markupsafe": "<2.0",
+                        # DEV: Flask 1.0.x is missing a maximum version for werkzeug dependency
+                        "werkzeug": "<2.0",
                     },
                 ),
                 Venv(
@@ -788,6 +790,8 @@ def select_pys(min_version=MIN_PYTHON_VERSION, max_version=MAX_PYTHON_VERSION):
                         # https://github.com/pallets/markupsafe/issues/282
                         # DEV: Breaking change made in 2.1.0 release
                         "markupsafe": "<2.0",
+                        # DEV: Flask 1.0.x is missing a maximum version for werkzeug dependency
+                        "werkzeug": "<2.0",
                     },
                 ),
                 # Flask >= 2.0.0