Add support for flask 2 (census-instrumentation#1119)

Author: lzchen

contrib/opencensus-ext-flask/CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+- Add support for Flask 2
+([#1032](https://github.com/census-instrumentation/opencensus-python/pull/1032))
+
 ## 0.7.5
 Released 2021-05-13
 

contrib/opencensus-ext-flask/setup.py

@@ -41,7 +41,7 @@
     include_package_data=True,
     long_description=open('README.rst').read(),
     install_requires=[
-        'flask >= 0.12.3, < 2.0.0, != 1.1.3',
+        'flask >= 0.12.3, < 3.0.0, != 1.1.3',
         'opencensus >= 0.9.dev0, < 1.0.0',
     ],
     extras_require={},

tox.ini

@@ -60,7 +60,7 @@ deps =
 
 commands = 
   py3{6,7,8,9}-unit: {[constants]unit-base-command}
-  py{27,34,35}-unit: {[constants]unit-base-command} --ignore=contrib/opencensus-ext-stackdriver
+  py{27,34,35}-unit: {[constants]unit-base-command} --ignore=contrib/opencensus-ext-stackdriver --ignore=contrib/opencensus-ext-flask
 
   ; TODO system tests
   lint: isort --check-only --diff --recursive .