chore(deps): Bump sqlite3 from 1.6.5 to 1.6.8 in /pact_broker

Bumps [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) from 1.6.5 to 1.6.8.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/master/CHANGELOG.md)
- [Commits](sparklemotion/sqlite3-ruby@v1.6.5...v1.6.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

pact_broker/Gemfile.lock

@@ -60,7 +60,7 @@ GEM
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     json (2.6.3)
-    mini_portile2 (2.8.4)
+    mini_portile2 (2.8.5)
     moments (0.2.0)
     multi_json (1.15.0)
     mustermann (2.0.2)
@@ -144,7 +144,7 @@ GEM
       rack (~> 2.2)
       rack-protection (= 2.2.4)
       tilt (~> 2.0)
-    sqlite3 (1.6.5)
+    sqlite3 (1.6.8)
       mini_portile2 (~> 2.8.0)
     stringio (3.0.7)
     table_print (1.5.7)