Fix tree-sitter-r parser

.gitmodules

@@ -33,5 +33,5 @@
 	url = [email protected]:OpenModelica/tree-sitter-modelica.git
 [submodule "parsers/r"]
 	path = parsers/r
-	url = [email protected]:r-lib/tree-sitter-r.git
+	url = [email protected]:rien/tree-sitter-r.git
 	branch = next

cli/package.json

@@ -38,23 +38,13 @@
   "dependencies": {
     "@dodona/dolos-lib": "3.0.0",
     "@dodona/dolos-web": "2.4.2",
-    "@elm-tooling/tree-sitter-elm": "^5.6.6",
     "chalk": "^5.0.0",
     "cliui": "^8.0.0",
     "commander": "^11.0.0",
     "csv-stringify": "^6.2.0",
     "express": "^4.17.1",
     "open": "^9.0.0",
-    "tree-sitter": "^0.20.0",
-    "tree-sitter-bash": "^0.20.3",
-    "tree-sitter-c": "^0.20.1",
-    "tree-sitter-c-sharp": "^0.20.0",
-    "tree-sitter-cpp": "^0.20.0",
-    "tree-sitter-javascript": "^0.20.0",
-    "tree-sitter-java": "^0.20.0",
-    "tree-sitter-php": "^0.19.0",
-    "tree-sitter-python": "^0.20.1",
-    "tree-sitter-typescript": "^0.20.0"
+    "tree-sitter": "^0.20.6"
   },
   "bugs": {
     "url": "https://github.com/dodona-edu/dolos/issues"