Bump wiremock from 2.21.0 to 2.22.0

[dependabot-preview]

Bumps wiremock from 2.21.0 to 2.22.0.

Commits

• 6abccfb Bumped minor version
• a2586ae Added a template method to ResponseTemplateTransformer allowing a subclass to...
• 54f500a Replace usage of internal java.xml class with public abstraction (#1098)
• 739999f Attempt to fix Travis build failures by switching test truststore based on JV...
• bad5c7f 3rd attempt at upgrading openjdk7 in Travis to avoid build failures due to ke...
• 8f413ba Added some debug output to the travis config
• 1cbfcab 2nd attempt at upgrading openjdk7 in Travis to avoid build failures due to ke...
• 36c9e1c Added missing sudo to package upgrade command in the Travis config
• 85760b7 Attempt at upgrading openjdk7 in Travis to avoid build failures due to keysto...
• 681833e Added some diagnostic info to the Travis config
• Additional commits viewable in compare view

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