No syntax highlighting for gradle files

[nathansizemore]

macOS v10.12.6 emacs v25.3.1

File mode specification error: (void-variable groovy-postfix-operator-regex)

import java.nio.file.Paths

buildscript {
    repositories {
        maven {
            url "http://cool.website"
        }
    }

    dependencies {
        classpath 'org.gradle.api.plugins:gradle-tomcat-plugin:0.9.9',
    }
}

repositories {
    maven {
        url "http://cool.website"
    }
}

[bwolf]

Same here with GNU Emacs 26.0.91, macOS 10.13.4.

[Wilfred]

Duplicate of #116.