Replace nose with coverage

requires/testing.txt

@@ -1,3 +1,2 @@
-coverage==4.5.4
-nose==1.3.7
-tox==3.13.2
+coverage==6.3
+tox==3.24.5

setup.cfg

@@ -9,12 +9,14 @@ warning-is-error = 1
 [flake8]
 exclude = env,build
 
-[nosetests]
-cover-branches = 1
-cover-erase = 1
-cover-package = sprockets.http
-cover-html = 1
-cover-html-dir = build/coverage
-
 [upload_docs]
 upload_dir = build/sphinx/html
+
+[coverage:run]
+branch = True
+command_line = -m unittest discover tests --buffer --verbose
+
+[coverage:report]
+show_missing = True
+include =
+    sprockets/*

setup.py

@@ -54,7 +54,6 @@ setuptools.setup(
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Software Development :: Libraries',
         'Topic :: Software Development :: Libraries :: Python Modules'],
-    test_suite='nose.collector',
     tests_require=read_requirements('testing.txt'),
     python_requires='>=3.5',
     zip_safe=True,

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py35,py36,py37,py38,py39,tornado,tornado50
+envlist = py37,py38,py39,tornado,tornado50
 indexserver =
 	default = https://pypi.python.org/simple
 toxworkdir = build/tox
@@ -8,10 +8,13 @@ use_develop = True
 
 [testenv]
 commands =
-	nosetests -v
+	coverage run
 
 deps =
+    .
 	-rrequires/testing.txt
+extras =
+    sentry
 
 [testenv:tornado]
 commands =