Adds check for version number when running bson manifest tests

[BaileyBox]

These tests were failing, as the formatting for the manifest changes between julia version 1.6 and 1.7.

For versions before 1.7, we can just check if the JLSO manifest has the BSON key in it.

For versions equal to 1.7, we have to check the deps field within the manifest for the BSON key.

These changes will fix this issue: #118