Bump mockwebserver from 4.1.1 to 4.2.2

Bumps [mockwebserver](https://github.com/square/okhttp) from 4.1.1 to 4.2.2.
- [Release notes](https://github.com/square/okhttp/releases)
- [Changelog](https://github.com/square/okhttp/blob/master/CHANGELOG.md)
- [Commits](square/okhttp@parent-4.1.1...parent-4.2.2)

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

Author: dependabot-preview[bot]

build.gradle

@@ -61,7 +61,7 @@ dependencies {
     testCompile group: 'org.hamcrest', name: 'hamcrest-library', version: '2.1'
     testCompile group: 'org.skyscreamer', name: 'jsonassert', version: '1.5.0'
     testCompile group: 'org.jsoup', name: 'jsoup', version: '1.12.1'
-    testCompile group: 'com.squareup.okhttp3', name: 'mockwebserver', version: '4.1.1'
+    testCompile group: 'com.squareup.okhttp3', name: 'mockwebserver', version: '4.2.2'
     testCompile group: 'org.jsoup', name: 'jsoup', version: '1.12.1'
 }