1.3.0

More quality of life and code quality changes.

• Provide archive download of a full paste (#92)
• Add a resyntax command to rerun lexer over all pastes (#70)
• Paste expiry options now come from the configuration file (#53)
• Convert tabs/enters to indentation, contributed by millefalcon (#90)
• Add line highlighting, contributed by erlliam (#39)
• Implement naive defensive measures (ratelimiting) (#98)