Build failed with version 1.5.4

Hi, I built a Cordova project for Android platform yesterday using plugin version 1.5.3: everything worked fine. This morning build process fails, the only difference is the new version of this plugin used, today I’m using 1.5.4 (released yesterday).

* What went wrong:
A problem occurred configuring root project 'android'.
> Jack is required to support java 8 language features.  Either enable Jack or remove sourceCompatibility JavaVersion.VERSION_1_8.

I think the issue is with the new version, due to your comment inside the release notes: Removed Jackass v1.5.4.

System info (by Ionic)

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 7.1.0 

local packages:

    Cordova Platforms : android 6.3.0
    Ionic Framework   : ionic1 ^1.3.5

System:

    ios-deploy : 1.8.6 
    ios-sim    : 5.0.8 
    Node       : v9.8.0
    npm        : 5.8.0 
    OS         : macOS High Sierra
    Xcode      : Xcode 9.3 Build version 9E145 

Environment Variables:

    ANDROID_HOME : /Applications/Android Studio.app/sdk

Misc:

    backend : pro

Let me know if you need more info to understand the issue. Thanks.

[ericmorand]

So you created a breaking change on a patch release?

[EddyVerbruggen]

Just pin to an older version of the plugin for now.

See #108.