package.json: bump version 0.2.15 -> 0.2.16

- Add firenvim#write() function enabling users to write arbitrary data (236ea75)
- Better messages for firenvim_config misconfiguration (cbbd7e8)
- Fix for firenvim being unusable with nightly neovim (79ca923 / #1603)
- Better WSL support (#1578) (7e2f12b)

package.json

@@ -66,7 +66,7 @@
       "ts"
     ]
   },
-  "version": "0.2.15",
+  "version": "0.2.16",
   "devDependencies": {
     "@types/firefox-webext-browser": "^120.0.3"
   }