Bump sqlite3 from 1.6.3 to 1.6.4

Bumps [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/master/CHANGELOG.md)
- [Commits](sparklemotion/sqlite3-ruby@v1.6.3...v1.6.4)

---
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

@@ -123,7 +123,7 @@ GEM
     marcel (1.0.2)
     method_source (1.0.0)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.2)
+    mini_portile2 (2.8.4)
     minitest (5.18.1)
     net-imap (0.3.6)
       date
@@ -259,9 +259,9 @@ GEM
       actionpack (>= 5.2)
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    sqlite3 (1.6.3)
+    sqlite3 (1.6.4)
       mini_portile2 (~> 2.8.0)
-    sqlite3 (1.6.3-x86_64-linux)
+    sqlite3 (1.6.4-x86_64-linux)
     thor (1.2.2)
     timeout (0.4.0)
     tzinfo (2.0.6)