Custom SSL context

What's Changed

• Custom SSL context by @mishankov in #26

Other Changes

• Bump actions/checkout from 3 to 4 by @dependabot in #14
• Bump actions/configure-pages from 4 to 5 by @dependabot in #17
• Update nim in CI by @mishankov in #20
• Add Nim 2.0.6 to CI by @mishankov in #24
• Bump jiro4989/setup-nim-action from 1 to 2 by @dependabot in #25

Full Changelog: v0.11.0...v0.12.0