correct release date for v9.45.0
[FIX] used tx_hash
[#364] raise error when previous hash is None + fix indentation
Merge pull request #366 from JahPowerBit/develop2

[#364] raise error when previous hash is None + fix indentation
Merge pull request #365 from Ignat99/sochainpy

[FIX] used tx_hash
[PIP] new versions in pip-requirements.txt
Merge pull request #367 from Ignat99/piprequirements

[PIP] new versions in pip-requirements.txt
renamed new `send.py`
Merge branch 'develop' into clean
typo
typo
updated and cleaned up README
further work on README
log lock acquisition
replace lockfile with singleton
moved singleton check to appropriate place
[#338] refresh next tx_index when there is a reorg
Merge pull request #377 from JahPowerBit/develop3

[#338] refresh next tx_index when there is a reorg
fixes #375
Add ToC

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