Bump sqlite3 from 1.6.7 to 1.6.9

Bumps [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) from 1.6.7 to 1.6.9.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/master/CHANGELOG.md)
- [Commits](sparklemotion/sqlite3-ruby@v1.6.7...v1.6.9)

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

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

Gemfile.lock

@@ -719,7 +719,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sqlite3 (1.6.7)
+    sqlite3 (1.6.9)
       mini_portile2 (~> 2.8.0)
     stringio (3.0.5)
     sxp (1.2.2)