Bump borsh from 0.6.0 to 0.7.0 (near#741)

Bumps [borsh](https://github.com/near/borsh-js) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/near/borsh-js/releases)
- [Commits](near/borsh-js@v0.6.0...v0.7.0)

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

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

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

package.json

@@ -12,7 +12,7 @@
     "types": "lib/index.d.ts",
     "dependencies": {
         "bn.js": "5.2.0",
-        "borsh": "^0.6.0",
+        "borsh": "^0.7.0",
         "bs58": "^4.0.0",
         "depd": "^2.0.0",
         "error-polyfill": "^0.1.3",