meta(isort): Move isort config to setup.cfg

.isort.cfg

@@ -1,7 +0,0 @@
-[settings]
-line_length=80
-known_first_party=sentry
-indent='    '
-multi_line_output=5
-lines_between_sections=1
-skip=setup.py

requirements-dev.txt

@@ -1,6 +1,6 @@
 autopep8>=1.3.5,<1.4.0
 Babel
 flake8>=3.5.0<3.6.0
-isort>=4.2.2,<4.3.0
+isort>=4.3.4,<4.4.0
 pycodestyle>=2.3.1,<2.4.0
 sentry-flake8>=0.0.1

setup.cfg

@@ -32,3 +32,13 @@ omit =
 source =
     src
     tests
+
+[isort]
+line_length=100
+lines_between_sections=1
+multi_line_output=5
+known_first_party=sentry
+default_section=THIRDPARTY
+forced_separate=django.contrib,django.utils
+indent='    '
+skip=setup.py