(Assuming jQuery is loaded anyway, i.e. excluding jQuery.) BEFORE: Edit (custom code) + deps: VIE, Create.js, Backbone, Underscore, jQuery UI Widget, jQuery UI Core AFTER: Edit (custom code) + deps: Backbone, Underscore

AFTER.txt

$ grunt
Running "concat:edit" (concat) task
File "build/edit.js" created.

Running "min:edit" (min) task
File "build/edit.min.js" created.
Uncompressed size: 83949 bytes.
Compressed size: 7684 bytes gzipped (29545 bytes minified).

Running "min:backbone" (min) task
File "build/backbone.min.js" created.
Uncompressed size: 94306 bytes.
Compressed size: 9905 bytes gzipped (30252 bytes minified).

Running "min:all" (min) task
File "build/all.min.js" created.
Uncompressed size: 178256 bytes.
Compressed size: 17226 bytes gzipped (59795 bytes minified).

Done, without errors.

BEFORE.txt

$ grunt
Running "concat:edit" (concat) task
File "build/edit.js" created.

Running "min:edit" (min) task
File "build/edit.min.js" created.
Uncompressed size: 76329 bytes.
Compressed size: 7686 bytes gzipped (27835 bytes minified).

Running "min:createjs" (min) task
File "build/create.min.js" created.
Uncompressed size: 51818 bytes.
Compressed size: 5712 bytes gzipped (23643 bytes minified).

Running "min:viejs" (min) task
File "build/vie.min.js" created.
Uncompressed size: 133810 bytes.
Compressed size: 9350 bytes gzipped (32370 bytes minified).

Running "min:backbone" (min) task
File "build/backbone.min.js" created.
Uncompressed size: 94306 bytes.
Compressed size: 9905 bytes gzipped (30252 bytes minified).

Running "min:jquiwidget" (min) task
File "build/jquiwidget.min.js" created.
Uncompressed size: 23265 bytes.
Compressed size: 3968 bytes gzipped (10560 bytes minified).

Running "min:all" (min) task
File "build/all.min.js" created.
Uncompressed size: 379532 bytes.
Compressed size: 34736 bytes gzipped (124652 bytes minified).

Done, without errors.

grunt-AFTER.js

module.exports = function(grunt) {
  grunt.initConfig({
    concat: {
      edit: {
        src: [
        'core/modules/edit/js/*.js',
        'core/modules/edit/js/editors/*.js',
        'core/modules/edit/js/models/*.js',
        'core/modules/edit/js/views/*.js'
        ],
        dest: 'build/edit.js'
      }
    },
    watch: {
      files: '<config:lint.all>',
      tasks: 'default'
    },
    min: {
      edit: {
        src: ['build/edit.js'],
        dest: 'build/edit.min.js'
      },
      backbone: {
        src: [
          'core/misc/backbone/backbone.js',
          'core/misc/underscore/underscore.js'
        ],
        dest: 'build/backbone.min.js'
      },
      all: {
        src: [
          'build/edit.js',
          'core/misc/backbone/backbone.js',
          'core/misc/underscore/underscore.js'
        ],
        dest: 'build/all.min.js'
      }
    },
    jshint: {
      options: {
        curly: true,
        immed: false,
        undef: true,
        browser: true,
        laxbreak: true
      },
      globals: {
        jQuery: true,
        _: true,
        Backbone: true,
        VIE: true,
        Drupal: true,
        drupalSettings: true
      }
    }
  });

  grunt.registerTask('default', 'concat min');
};

grunt-BEFORE.js

module.exports = function(grunt) {
  grunt.initConfig({
    concat: {
      edit: {
        src: [
        'core/modules/edit/js/*.js',
        'core/modules/edit/js/editors/*.js',
        'core/modules/edit/js/models/*.js',
        'core/modules/edit/js/views/*.js',
        'core/modules/edit/js/createjs/*.js',
        'core/modules/edit/js/viejs/*.js'
        ],
        dest: 'build/edit.js'
      }
    },
    watch: {
      files: '<config:lint.all>',
      tasks: 'default'
    },
    min: {
      edit: {
        src: ['build/edit.js'],
        dest: 'build/edit.min.js'
      },
      createjs: {
        src: ['core/misc/create/create-editonly.js'],
        dest: 'build/create.min.js'
      },
      viejs: {
        src: ['core/misc/vie/vie-core.js'],
        dest: 'build/vie.min.js'
      },
      backbone: {
        src: [
          'core/misc/backbone/backbone.js',
          'core/misc/underscore/underscore.js'
        ],
        dest: 'build/backbone.min.js'
      },
      jquiwidget: {
        src: [
          'core/misc/ui/ui/jquery.ui.core.js',
          'core/misc/ui/ui/jquery.ui.widget.js'
        ],
        dest: 'build/jquiwidget.min.js'
      },
      all: {
        src: [
          'build/edit.js',
          'core/misc/create/create-editonly.js',
          'core/misc/vie/vie-core.js',
          'core/misc/backbone/backbone.js',
          'core/misc/underscore/underscore.js',
          'core/misc/ui/ui/jquery.ui.core.js',
          'core/misc/ui/ui/jquery.ui.widget.js'
        ],
        dest: 'build/all.min.js'
      }
    },
    jshint: {
      options: {
        curly: true,
        immed: false,
        undef: true,
        browser: true,
        laxbreak: true
      },
      globals: {
        jQuery: true,
        _: true,
        Backbone: true,
        VIE: true,
        Drupal: true,
        drupalSettings: true
      }
    }
  });

  grunt.registerTask('default', 'concat min');
};