liferay-npm-bundler 1.6.0 fails if dependencies field is not available in package.json

[gamerson]

liferay-npm-bundler 1.6.0 assumes that all package.json files have both devDependencies and dependencies defined. If one is missing you get the following error:

src/main/resources/META-INF/resources/js/index.js -> build/resources/main/META-INF/resources/js/index.js
    /private/var/folders/zl/wtp3csp12zz06vwxlqhm_0z00000gn/T/junit7323077713988580432/gradle/foo/node_modules/liferay-npm-bundler/lib/index.js:141
                Object.keys(pkgJson[scope]).forEach(function (depName) {
                       ^

    TypeError: Cannot convert undefined or null to object
        at Function.keys (<anonymous>)
        at /private/var/folders/zl/wtp3csp12zz06vwxlqhm_0z00000gn/T/junit7323077713988580432/gradle/foo/node_modules/liferay-npm-bundler/lib/index.js:141:10
        at Array.forEach (<anonymous>)
        at copyRootPackageJson (/private/var/folders/zl/wtp3csp12zz06vwxlqhm_0z00000gn/T/junit7323077713988580432/gradle/foo/node_modules/liferay-npm-bundler/lib/index.js:140:38)
        at Object.exports.default (/private/var/folders/zl/wtp3csp12zz06vwxlqhm_0z00000gn/T/junit7323077713988580432/gradle/foo/node_modules/liferay-npm-bundler/lib/index.js:25:16)
        at Object.<anonymous> (/private/var/folders/zl/wtp3csp12zz06vwxlqhm_0z00000gn/T/junit7323077713988580432/gradle/foo/node_modules/liferay-npm-bundler/bin/liferay-npm-bundler.js:2:32)
        at Module._compile (module.js:573:30)
        at Object.Module._extensions..js (module.js:584:10)
        at Module.load (module.js:507:32)
        at tryModuleLoad (module.js:470:12)
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! foo@1.0.0 build: `babel --source-maps -d build/resources/main/META-INF/resources src/main/resources/META-INF/resources && liferay-npm-bundler`
    npm ERR! Exit status 1