0.9.2 - Various fixes

What's Changed

• Add str to timedelta by @scheibling in #17
• Updated documentation to include newer additions by @scheibling in #18
• Bugfix MAX_INT64, Linting Errors by @scheibling in #20
• Added timestamp extraction from datetime before conversion to int by @scheibling in #21
• Convert nonce field to bytestring by @scheibling in #22
• Ensure comment is always empty string on export by @scheibling in #26
• Misc. bugfixes, docs (RSA Alg, cert fingerprint error, docs) by @scheibling in #27

Full Changelog: 0.9.1...0.9.2