Add 32bit support

[tusharsadhwani]

• Adds x86 architecture suppor to the CI build scripts
• Adds the necessary machine suffixes for i686 machine types in the github download code
• Fixes type check issues, and mypy not running in CI
• Trim the fallback release datas to only the fields we use, and add a script to do that as needed in the future. (Reduces ~800kb of binary size)

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Here's it working on Ubuntu 18.04:

Resolves #14