Release SMAPI 2.6

[Pathoschild]

Prepare SMAPI 2.6 beta for release.

To do

Before 1.3 release

• [x] Remove "use SMAPI 2.5.5" message when running Stardew Valley 1.2.
• [x] Add option to hide beta releases on smapi.io.
• [x] Polish release notes.
• [x] Draft release summary.
• [x] Bump minimum game version to 1.3 release.
• [x] Draft 1.3 FAQs subreddit thread.

After 1.3 release

• [x] Post 1.3 FAQs subreddit thread.
• [x] Release SMAPI 2.6.
• [x] Disable beta on smapi.io.

[Pathoschild]

Draft release summary:

SMAPI 2.6 is a big update, with nearly 400 commits over two months. Some mods aren't updated for Stardew Valley 1.3 yet; see the mod compatibility list for the latest updates and fixes. (For mod authors: see the mod author's migration guide.)

There are too many changes to list here, but here are some highlights for players:

• updated for Stardew Valley 1.3;
• added automatic save backups;
• significantly improved SMAPI's update checks (including support for optional and unofficial updates);
• fixed default color scheme on Mac;
• fixed many bugs (including SEHException errors for some players);
• updated compatibility list.

And some highlights for modders:

• added an input API for reading and suppressing keyboard/controller/mouse input;
• added support for custom seasonal map tilesheets;
• added support for intercepting assets loaded by temporary content managers;
• added prototype SMAPI 3.0 events;
• added a prototype mod handler toolkit for external tools;
• added code analysis to flag common issues as build warnings;
• added support for reloading NPC schedules through the content API;
• reimplemented content API and input suppression to work more consistently in many edge cases;
• many changes to support multiplayer.

Requires Stardew Valley 1.3.XX or later on Linux/Mac/Windows.

See the release notes and mod compatibility list for more info.

[Pathoschild]

Done!