Solving a conflict (this was a double conflict, actually)

Dependencies

• [2] VO5OQW4W Removing anyhow in libpijul
• [3] HMMMKONL Fixing alive vertices
• [4] 7FFFKQZU add 'Default' implementations
• [*] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).

Change contents

• resolve order conflict in libpijul/src/missing_context.rs at line 323
  [2.26882]

  [4.602]
• resolve order conflict in libpijul/src/apply.rs at line 544
  [3.1052]

  [4.674]