Update tag/value parser for SPDX spec version 2.3

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• [x] *Update versions in test files
• [x] *Additional hash algorithms [SHA3-256][SHA3-256], [SHA3-384][SHA3-384], [SHA3-512][SHA3-512], [BLAKE2b-256][BLAKE2b-256], [BLAKE2b-384][BLAKE2b-384], [BLAKE2b-512][BLAKE2b-512], [BLAKE3][BLAKE3], [ADLER32][ADLER32]
• [x] *Test missing license concluded, license declared, and copyright
• [x] *Add Package Purpose as described in section 7.24
• [x] *Add Release Date as described in section 7.25
• [x] *Add Built Date as described in section 7.26
• [x] *Add Valid Until date as described in section 7.27
• [x] *Add relationship REQUIREMENT_DESCRIPTION_FOR
• [x] *Add relationship SPECIFICATION_FOR

Also - fixes #23

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Note that this will not pass the CI until the dependent SPDX Java Library version 1.1.0 is available from Maven central.