v1.0.0.pre10

What's Changed

• Bump comrak from 0.17.1 to 0.18.0 by @dependabot in #237
• Bump magnus from 0.5.2 to 0.5.3 by @dependabot in #238
• Bump magnus from 0.5.3 to 0.5.4 by @dependabot in #242
• Move debug gems into test env by @gjtorikian in #245

Full Changelog: v1.0.0.pre9...v1.0.0.pre10