Bump supported versions

Author: mfussenegger

.github/workflows/tests.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        neovim_version: ['nightly', 'v0.7.2', 'v0.8.0']
+        neovim_version: ['nightly', 'v0.8.3', 'v0.9.0']
 
     steps:
       - uses: actions/checkout@v2

README.md

@@ -24,8 +24,8 @@
 Supported Neovim versions:
 
 - Latest nightly
-- 0.8.0 (Recommended)
-- 0.7.2
+- 0.9.x (Recommended)
+- 0.8.3
 
 You'll need to install and configure a debug adapter per language. See