chore: add EditorConfig to GitPod config

.gitignore

@@ -4,3 +4,6 @@ Pipfile.lock
 /build
 /dist
 /kosmorrolib.egg-info
+
+# Gitpod-specific:
+/.vscode/**

.gitpod.yml

@@ -5,6 +5,7 @@ github:
 vscode:
   extensions:
     - ms-vscode.makefile-tools
+    - editorconfig.editorconfig
 
 tasks:
   - before: pip install -U pip pipenv