Update to iSort 5.0

.isort.cfg

@@ -1,3 +1,3 @@
 [settings]
 line_length=88
-known_third_party=OpenSSL, SCons, autobahn, jsonrpc, twisted, zope
+known_third_party=OpenSSL, SCons, jsonrpc, twisted, zope

Makefile

@@ -3,8 +3,8 @@ lint:
 	pylint -j 6 --rcfile=./.pylintrc ./tests
 
 isort:
-	isort -rc ./platformio
-	isort -rc ./tests
+	isort ./platformio
+	isort ./tests
 
 format:
 	black --target-version py27 ./platformio

platformio/platform/factory.py

@@ -37,6 +37,8 @@ class PlatformFactory(object):
 
     @classmethod
     def new(cls, pkg_or_spec):
+        # pylint: disable=import-outside-toplevel
+
         platform_dir = None
         platform_name = None
         if isinstance(pkg_or_spec, PackageItem):
@@ -45,9 +47,7 @@ class PlatformFactory(object):
         elif os.path.isdir(pkg_or_spec):
             platform_dir = pkg_or_spec
         else:
-            from platformio.package.manager.platform import (  # pylint: disable=import-outside-toplevel
-                PlatformPackageManager,
-            )
+            from platformio.package.manager.platform import PlatformPackageManager
 
             pkg = PlatformPackageManager().get_package(pkg_or_spec)
             if not pkg:

tox.ini

@@ -20,7 +20,7 @@ passenv = *
 usedevelop = True
 deps =
     py36,py37,py38,py39: black
-    isort<5
+    isort
     pylint
     pytest
     pytest-xdist