Add Taproot support

[alecalve]

Creating this as a new MR instead of #101 to benefit from the new GitHub actions CI.

[pep8speaks]

Hello @alecalve! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file blockchain_parser/tests/test_taproot.py:

Line 12:35: W291 trailing whitespace
Line 17:80: E501 line too long (87 > 79 characters)
Line 27:1: E402 module level import not at top of file
Line 30:80: E501 line too long (82 > 79 characters)
Line 31:80: E501 line too long (90 > 79 characters)
Line 32:80: E501 line too long (89 > 79 characters)
Line 33:80: E501 line too long (87 > 79 characters)
Line 34:80: E501 line too long (89 > 79 characters)
Line 47:10: E111 indentation is not a multiple of four
Line 47:10: E117 over-indented
Line 50:56: E231 missing whitespace after ','
Line 50:80: E501 line too long (83 > 79 characters)
Line 55:86: W292 no newline at end of file

• In the file blockchain_parser/utils_taproot.py:

Line 125:9: E125 continuation line with same indent as next logical line
Line 126:13: E117 over-indented