Bump sqlite3 from 1.6.6 to 1.6.7

Bumps [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) from 1.6.6 to 1.6.7.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/sqlite3-ruby/compare/v1.6.6...v1.6.7)

---
updated-dependencies:
- dependency-name: sqlite3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -39,7 +39,7 @@ GEM
     sinatra-sequel (0.9.0)
       sequel (>= 3.2.0)
       sinatra (>= 0.9.4)
-    sqlite3 (1.6.6)
+    sqlite3 (1.6.7)
       mini_portile2 (~> 2.8.0)
     tilt (2.0.11)
     webrick (1.7.0)