Bump json_schemer from 0.2.18 to 0.2.19

Bumps [json_schemer](https://github.com/davishmcclurg/json_schemer) from 0.2.18 to 0.2.19.
- [Release notes](https://github.com/davishmcclurg/json_schemer/releases)
- [Commits](https://github.com/davishmcclurg/json_schemer/compare/v0.2.18...v0.2.19)

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

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

Gemfile.lock

@@ -231,7 +231,7 @@ GEM
     js-routes (2.2.2)
       railties (>= 4)
     json (2.6.1)
-    json_schemer (0.2.18)
+    json_schemer (0.2.19)
       ecma-re-validator (~> 0.3)
       hana (~> 1.3)
       regexp_parser (~> 2.0)
@@ -393,7 +393,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rbtree (0.4.4)
-    regexp_parser (2.2.0)
+    regexp_parser (2.2.1)
     remotipart (1.4.4)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)