Add requirements-dev.txt

requirements-dev.in

@@ -0,0 +1,6 @@
+black
+flake8
+pip-tools
+pyls-black
+pyls-isort
+python-language-server[rope]

requirements-dev.txt

@@ -0,0 +1,33 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile --output-file=requirements-dev.txt requirements-dev.in
+#
+appdirs==1.4.3            # via black
+attrs==19.3.0             # via black
+black==19.10b0            # via -r requirements-dev.in, pyls-black
+click==7.1.1              # via black, pip-tools
+entrypoints==0.3          # via flake8
+flake8==3.7.9             # via -r requirements-dev.in
+importlib-metadata==1.5.0  # via pluggy
+isort==4.3.21             # via pyls-isort
+jedi==0.15.2              # via python-language-server
+mccabe==0.6.1             # via flake8
+parso==0.6.2              # via jedi
+pathspec==0.7.0           # via black
+pip-tools==4.5.1          # via -r requirements-dev.in
+pluggy==0.13.1            # via python-language-server
+pycodestyle==2.5.0        # via flake8
+pyflakes==2.1.1           # via flake8
+pyls-black==0.4.4         # via -r requirements-dev.in
+pyls-isort==0.1.1         # via -r requirements-dev.in
+python-jsonrpc-server==0.3.4  # via python-language-server
+python-language-server[rope]==0.31.8  # via -r requirements-dev.in, pyls-black, pyls-isort
+regex==2020.2.20          # via black
+rope==0.16.0              # via python-language-server
+six==1.14.0               # via pip-tools
+toml==0.10.0              # via black, pyls-black
+typed-ast==1.4.1          # via black
+ujson==1.35               # via python-jsonrpc-server, python-language-server
+zipp==3.1.0               # via importlib-metadata