fix: connection is undefined when connecting to LitContracts
#667
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Description
Fix for this: (Unable to connect using the LitContracts client)

Due to this was added in the PR:
https://github.com/LIT-Protocol/js-sdk/pull/639/files#diff-2dcc2c94e7788b1bbaef5e6cf9158025a2580d238f807bd3cb923bbe355eb47bR401-R406
And we need this patch for the following affected versions:
Anything <= 6.5.3 are working