fix(deps): pin webgl addon to v0.5.0

fixes #28 failing

Author: UziTech

package.json

@@ -56,7 +56,7 @@
     "xterm": "^4.4.0",
     "xterm-addon-fit": "^0.3.0",
     "xterm-addon-web-links": "^0.2.1",
-    "xterm-addon-webgl": "^0.5.0"
+    "xterm-addon-webgl": "0.5.0"
   },
   "devDependencies": {
     "@semantic-release/apm-config": "^8.0.0",