chore(deps): update dependency camelcase to v7 (#22)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -16,7 +16,7 @@
         "egg-static": "2.2.0",
         "egg-onerror": "2.1.1",
         "koa-onerror": "4.2.0",
-        "camelcase": "6.3.0",
+        "camelcase": "7.0.0",
         "koa-passport": "5.0.0",
         "cookies": "0.8.0",
         "file-stream-rotator": "0.6.1",