Use get_eol_chars utility function added to python-lsp-server 1.4.0

Also drop support for Python 3.6 because that version of
python-lsp-server only supports 3.7+

Author: ccordoba12

.github/workflows/python.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}

pylsp_black/_utils.py

@@ -6,8 +6,7 @@
 import black
 import toml
 from pylsp import hookimpl
-
-from pylsp_black._utils import get_eol_chars
+from pylsp._utils import get_eol_chars
 
 logger = logging.getLogger(__name__)
 

pylsp_black/plugin.py

@@ -18,8 +18,8 @@ classifiers =
 
 [options]
 packages = find:
-install_requires = python-lsp-server; black>=19.3b0; toml
-python_requires = >= 3.6
+install_requires = python-lsp-server>=1.4.0; black>=19.3b0; toml
+python_requires = >= 3.7
 
 [options.entry_points]
 pylsp = pylsp_black = pylsp_black.plugin