* update cursor in next_page_token, add request_headers
* .
* fix unit tests
* also fix SyncMode.incremental so it doesn't return duplicate records in race conditions
* fix client version in json_schemas
* fix version number
* fix sync_mode
* cache json_schemas to pass typecheck
* never mind
* fix sync_mode
* update metadata and doc
* backward compatiblity bypass
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Co-authored-by: Marcos Marx <marcosmarxm@users.noreply.github.com>
Co-authored-by: marcosmarxm <marcosmarxm@gmail.com>
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