Update for 2.0.0 (final) release; add compat/testing for Python 3.9-3.12; add DeprecationWarning on import

Author: ptmcg

README.rst

@@ -2,6 +2,10 @@
 Flask-OpenTracing
 #################
 
+**Note:** *This package is no longer maintained or supported. Migrate your application
+to use* `opentelemetry-api`_.
+
+
 This package enables distributed tracing in Flask applications via `The OpenTracing Project`_. Once a production system contends with real concurrency or splits into many services, crucial (and formerly easy) tasks become difficult: user-facing latency optimization, root-cause analysis of backend errors, communication about distinct pieces of a now-distributed system, etc. Distributed tracing follows a request on its journey from inception to completion from mobile/browser all the way to the microservices. 
 
 As core services and libraries adopt OpenTracing, the application builder is no longer burdened with the task of adding basic tracing instrumentation to their own code. In this way, developers can build their applications with the tools they prefer and benefit from built-in tracing instrumentation. OpenTracing implementations exist for major distributed tracing systems and can be bound or swapped with a one-line configuration change.
@@ -13,6 +17,7 @@ If you are migrating from the 0.x series, you may want to read the list of `brea
 .. _The OpenTracing Project: http://opentracing.io/
 .. _source code: https://github.com/opentracing/opentracing-python
 .. _breaking changes: #breaking-changes-from-0-x
+.. _opentelemetry-api: https://pypi.org/project/opentelemetry-api/
 
 Installation
 ============

VERSION

@@ -1 +1 @@
-1.1.0
+2.0.0

flask_opentracing/__init__.py

@@ -1,2 +1,11 @@
+import warnings
+
 from .tracing import FlaskTracing  # noqa
 from .tracing import FlaskTracing as FlaskTracer  # noqa, deprecated
+
+warnings.warn(
+     'This package is no longer supported.'
+     ' Migrate to using opentelemetry-api.',
+     DeprecationWarning,
+     stacklevel=2
+)

setup.py

@@ -42,15 +42,15 @@
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
+        'Development Status :: 7 - Inactive',
         'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
         'Topic :: Software Development :: Libraries :: Python Modules'
     ]

tox.ini

@@ -1,18 +1,18 @@
 [tox]
-envlist = py27,py3{5,6,7,8,9,10,11,12},pypy{,3},flake8
+envlist = py3{8,9,10,11,12},pypy{,3},flake8
 skip_missing_interpreters = true
 
 [travis]
 python =
-    3.7: py37,flake8
+    3.9: py39,flake8
 
 [travis:env]
 TRAVIS_BUILD_STAGE_NAME =
     Lint: flake8
-    Test: py27,py3{5,6,7,8},pypy{,3}
+    Test: py3{8,9,10,11,12},pypy{,3}
 
 [testenv:flake8]
-basepython = python3.7
+basepython = python3.9
 deps =
     flake8
     flake8-quotes