Update dev-dependencies

Author: wooorm

package.json

@@ -20,7 +20,7 @@
     "@types/mdast": "^3.0.0",
     "@types/tape": "^4.0.0",
     "c8": "^7.0.0",
-    "camelcase": "^6.0.0",
+    "camelcase": "^7.0.0",
     "execa": "^6.0.0",
     "mdast-util-assert": "^4.0.0",
     "mdast-util-gfm": "^2.0.0",
@@ -33,7 +33,7 @@
     "typescript": "^4.0.0",
     "unified": "^10.0.0",
     "unist-util-remove-position": "^4.0.0",
-    "xo": "^0.49.0"
+    "xo": "^0.50.0"
   },
   "scripts": {
     "build": "npm run build --workspaces && rimraf \"*.d.ts\" \"{test,script}/**/*.d.ts\" && tsc && type-coverage",