Bump webmock from 3.18.1 to 3.19.1 (#676)

Bumps [webmock](https://github.com/bblimke/webmock) from 3.18.1 to 3.19.1.
- [Changelog](https://github.com/bblimke/webmock/blob/master/CHANGELOG.md)
- [Commits](bblimke/webmock@v3.18.1...v3.19.1)

---
updated-dependencies:
- dependency-name: webmock
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: PaulDoyle-DEFRA <[email protected]>

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-    addressable (2.8.4)
+    addressable (2.8.5)
       public_suffix (>= 2.0.2, < 6.0)
     airbrake (13.0.3)
       airbrake-ruby (~> 6.0)
@@ -302,7 +302,7 @@ GEM
     protocol-http2 (0.15.1)
       protocol-hpack (~> 1.4)
       protocol-http (~> 0.18)
-    public_suffix (5.0.1)
+    public_suffix (5.0.3)
     racc (1.7.1)
     rack (2.2.8)
     rack-test (2.1.0)
@@ -351,7 +351,7 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -450,7 +450,7 @@ GEM
     validates_email_format_of (1.7.2)
       i18n
     vcr (6.2.0)
-    webmock (3.18.1)
+    webmock (3.19.1)
       addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)