CPP extension added. Theia updated.

Signed-off-by: Jan Bicker <[email protected]>

Author: jbicker

arduino-ide-extension/package.json

@@ -21,6 +21,7 @@
     "@theia/navigator": "next",
     "@theia/terminal": "next",
     "@theia/search-in-workspace": "next",
+    "@theia/cpp": "next",
     "@types/ps-tree": "^1.1.0",
     "@types/which": "^1.3.1",
     "@types/react-select": "^3.0.0",