add medea_jason.wasm hash parametr

[rogurotus]

Synopsis

A browser cache ignores updating medea_jason_bg.wasm.

Checklist

• Created PR:
  • [x] In draft mode
  • [x] Name contains Draft: prefix
  • [x] Name contains issue reference
  • [x] Has k:: labels applied
  • [x] Has assignee
• [x] Documentation is updated (if required)
• [x] Tests are updated (if required)
• [x] Changes conform code style
• [x] CHANGELOG entry is added (if required)
• [x] FCM (final commit message) is posted
  • [x] and approved
• [x] Review is completed and changes are approved
• Before merge:
  • [x] Milestone is set
  • [x] PR's name and description are correct and up-to-date
  • [x] Draft: prefix is removed
  • [x] All temporary labels are removed

[rogurotus]

FCM:

Add SHA-256 checksum for loading `medea_jason.wasm` file on Web (#83)

Additionally:
- fix wrong type for `MediaDisplayInfo.deviceId()` platform binding
- use fat LTO in release profile for smaller binaries
- override crate type when building binaries so LTO would work