Bump Jedi upper pin to <0.20 (#416)

Author: bnavigator

pyproject.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 license = {text = "MIT"}
 requires-python = ">=3.7"
 dependencies = [
-    "jedi>=0.17.2,<0.19.0",
+    "jedi>=0.17.2,<0.20.0",
     "python-lsp-jsonrpc>=1.0.0",
     "pluggy>=1.0.0",
     "docstring-to-markdown",