Bump wicked_pdf from 1.2.1 to 1.2.2 (#401)

Bumps [wicked_pdf](https://github.com/mileszs/wicked_pdf) from 1.2.1 to 1.2.2.
- [Release notes](https://github.com/mileszs/wicked_pdf/releases)
- [Changelog](https://github.com/mileszs/wicked_pdf/blob/master/CHANGELOG.md)
- [Commits](mileszs/wicked_pdf@1.2.1...1.2.2)

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

Gemfile.lock

@@ -301,7 +301,7 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff
-    wicked_pdf (1.2.1)
+    wicked_pdf (1.2.2)
       activesupport
 
 PLATFORMS