Bump json-schema from 2.8.1 to 3.0.0

Bumps [json-schema](https://github.com/voxpupuli/json-schema) from 2.8.1 to 3.0.0.
- [Release notes](https://github.com/voxpupuli/json-schema/releases)
- [Changelog](https://github.com/voxpupuli/json-schema/blob/master/CHANGELOG.md)
- [Commits](voxpupuli/json-schema@v2.8.1...v3.0.0)

---
updated-dependencies:
- dependency-name: json-schema
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Gemfile

@@ -24,7 +24,7 @@ gem 'graphql'
 gem 'honeybadger', '~> 4.12'
 gem 'httparty'
 gem 'jquery-rails', '~> 4.4'
-gem 'json-schema', '~> 2.8'
+gem 'json-schema', '~> 3.0'
 gem 'librato-metrics', '~> 2.1.2'
 gem 'lograge'
 gem 'mime-types'

Gemfile.lock

@@ -188,8 +188,8 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json-schema (2.8.1)
-      addressable (>= 2.4)
+    json-schema (3.0.0)
+      addressable (>= 2.8)
     jwt (1.5.6)
     kaminari (1.2.1)
       activesupport (>= 4.1.0)
@@ -284,7 +284,7 @@ GEM
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    public_suffix (4.0.6)
+    public_suffix (4.0.7)
     puma (5.6.4)
       nio4r (~> 2.0)
     pundit (2.2.0)
@@ -482,7 +482,7 @@ DEPENDENCIES
   honeybadger (~> 4.12)
   httparty
   jquery-rails (~> 4.4)
-  json-schema (~> 2.8)
+  json-schema (~> 3.0)
   librato-metrics (~> 2.1.2)
   listen (~> 3.7)
   lograge