Upgrade to isort 5 (#28)

Author: rupert

Makefile

@@ -10,10 +10,10 @@ black-check:
 	black --diff --check .
 
 isort:
-	isort --recursive .
+	isort .
 
 isort-check:
-	isort --recursive --check-only .
+	isort --check-only .
 
 mypy:
 	mypy .

setup.cfg

@@ -22,7 +22,7 @@ install_requires = python-language-server; black>=19.3b0; toml
 pyls = pyls_black = pyls_black.plugin
 
 [options.extras_require]
-dev = isort; flake8; pytest; mypy; pytest
+dev = isort>=5.0; flake8; pytest; mypy; pytest
 
 [flake8]
 max-line-length = 88
@@ -32,4 +32,4 @@ ignore = E203
 ignore_missing_imports = true
 
 [isort]
-line_length = 88
+profile = black