Upgrade to Google Closure compiler v20180716.

[twwwt]

I have upgraded Googles Closure compiler to latest release. In addition, most dependencies - plugins as well as other libraries - have been upgrade.

I would be happy to get that merged and have a new release published. Thanks!

[prsng]

@twwwt Possible for you to resolve the conflicting files as mentioned above? I am hoping that we can soon see a fix committed for the gradle 6 upgrade for this plugin.

[twwwt]

@prsng I don't have write access to eriwen/gradle-js-plugin. Actually, I don't quite understand which conflicting files you mean/conflicts between which files?

[prsng]

@prsng I don't have write access to eriwen/gradle-js-plugin. Actually, I don't quite understand which conflicting files you mean/conflicts between which files?

I apologize for not being clear. The pull page shows this:

This branch has conflicts that must be resolved
Only those with write access to this repository can merge pull requests.
Conflicting files
build.gradle
gradle/wrapper/gradle-wrapper.jar
gradle/wrapper/gradle-wrapper.properties
src/main/groovy/com/eriwen/gradle/js/JavaScriptExtension.groovy

I hope someone with write access sees this.