Bump hexo-util from 2.6.1 to 2.7.0

Bumps [hexo-util](https://github.com/hexojs/hexo-util) from 2.6.1 to 2.7.0.
- [Release notes](https://github.com/hexojs/hexo-util/releases)
- [Commits](https://github.com/hexojs/hexo-util/compare/2.6.1...2.7.0)

---
updated-dependencies:
- dependency-name: hexo-util
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -296,9 +296,9 @@
       }
     },
     "node_modules/hexo-util": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/hexo-util/-/hexo-util-2.6.1.tgz",
-      "integrity": "sha512-xj1jUrId2qTe8L/tRizWWRl+j7X1Zzh5rCVtffboOU0p/EfbPomxIxDvntTHT3fcqgvLHsncqJF9V5j7+buOqA==",
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/hexo-util/-/hexo-util-2.7.0.tgz",
+      "integrity": "sha512-hQM3h34nhDg0bSe/Tg1lnpODvNkz7h2u0+lZGzlKL0Oufp+5KCAEUX9wal7/xC7ax3/cwEn8IuoU75kNpZLpJQ==",
       "dependencies": {
         "bluebird": "^3.5.2",
         "camel-case": "^4.0.0",
@@ -678,9 +678,9 @@
       }
     },
     "hexo-util": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/hexo-util/-/hexo-util-2.6.1.tgz",
-      "integrity": "sha512-xj1jUrId2qTe8L/tRizWWRl+j7X1Zzh5rCVtffboOU0p/EfbPomxIxDvntTHT3fcqgvLHsncqJF9V5j7+buOqA==",
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/hexo-util/-/hexo-util-2.7.0.tgz",
+      "integrity": "sha512-hQM3h34nhDg0bSe/Tg1lnpODvNkz7h2u0+lZGzlKL0Oufp+5KCAEUX9wal7/xC7ax3/cwEn8IuoU75kNpZLpJQ==",
       "requires": {
         "bluebird": "^3.5.2",
         "camel-case": "^4.0.0",