Betula v1.3.1

Hotfix. Please upgrade.

Release notes:

=> https://betula.mycorrhiza.wiki/v1.3.1.html

Danila Gorelko (1):
      Replace github.com/mattn/go-sqlite3 with modernc.org/sqlite (#8)

Timur Ismagilov (6):
      Add .PHONY to Makefile
      Revert "Replace github.com/mattn/go-sqlite3 with modernc.org/sqlite (#8)"
      Take back Danila's better querying
      Revert "Focus search input field on slash key press"
      Set version to v1.3.1
      Explicitly log favicon requests