Version 5.0.3

This patch-level release has a few small updates:

• Removed a couple MobX TypeScript properties that have already been removed in MobX in #1666 by @Strandinator
• Fixes array reconciliation in snapshotProcessor in #1784 by @adamkovalsky, fixing #1776
• Updates devDependencies across the project in #1786 by @jamonholmgren
• Some documentation updates as well

If there are any problems with this release, please file an issue or leave comments in the attached Discussion! Thanks to everyone who contributed!