Use last version of JNA

Without it I've an exception when getting keys from Windows Registry.
The issue appears when using a plugin which is using jbrowserdriver and
selenium-java.
selenium-java needs at least 4.1.0: http://bit.ly/2dNT2OY
jbrowserdriver seems to exclude it: http://bit.ly/2cPSmCM

CHANGELOG.md

@@ -1,5 +1,10 @@
 # gradle-msbuild-plugin changelog
 
+## 2.16
+
+### Fixed
+* Registry keys are found when looking for msbuild versions. The issue is related to the JNA version used in other plugins.
+
 ## 2.15
 
 ### Fixed

build.gradle

@@ -18,8 +18,8 @@ ext.dotnetPath = file('src/main/dotnet')
 dependencies {
     testCompile 'junit:junit:4.11'
     testCompile group: 'org.spockframework', name: 'spock-core', version: '0.7-groovy-2.0', transitive: false
-    compile 'net.java.dev.jna:jna:3.5.0'
-    compile 'net.java.dev.jna:platform:3.5.0'
+    compile 'net.java.dev.jna:jna:4.2.2'
+    compile 'net.java.dev.jna:jna-platform:4.2.2'
     compile 'com.google.guava:guava:16.0.1'
     compile 'commons-io:commons-io:2.4'
 }