Bump cross-fetch from 3.1.5 to 3.1.6 (#679)

Bumps [cross-fetch](https://github.com/lquixada/cross-fetch) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/lquixada/cross-fetch/releases)
- [Changelog](https://github.com/lquixada/cross-fetch/blob/v3.1.6/CHANGELOG.md)
- [Commits](lquixada/cross-fetch@v3.1.5...v3.1.6)

---
updated-dependencies:
- dependency-name: cross-fetch
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -74,7 +74,7 @@
   "dependencies": {
     "@oceanprotocol/contracts": "^1.1.12",
     "@oceanprotocol/lib": "^2.7.0",
-    "cross-fetch": "^3.1.4",
+    "cross-fetch": "^3.1.6",
     "ethereumjs-util": "^7.1.5"
   },
   "repository": {