Add support for colorbox 2.0

Problem/Motivation

I am unable to upgrade to Colorbox 2.0.0

Steps to reproduce

When I try to upgrade to Colorbox 2.0.0 I get the following Composer Dependency Error:

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires drupal/colorbox ^2.0, found drupal/colorbox[dev-2.0.x, 2.0.0, 2.0.x-dev] but these were not loaded, likely because it conflicts with another require.
Problem 2
- drupal/colorbox_field_formatter is locked to version 2.0.2 and an update of this package was not requested.
- drupal/colorbox_field_formatter 2.0.2 requires drupal/colorbox ^1.4 -> found drupal/colorbox[dev-1.x, 1.4.0, ..., 1.x-dev (alias of dev-1.x)] but it conflicts with your root composer.json require (^2.0).
Problem 3
- drupal/colorbox_inline is locked to version 1.2.0 and an update of this package was not requested.
- drupal/colorbox_inline 1.2.0 requires drupal/colorbox * -> found drupal/colorbox[dev-1.x, dev-2.0.x, 1.0.0, ..., 1.x-dev (alias of dev-1.x), 2.0.0, 2.0.x-dev] but these were not loaded, likely because it conflicts with another require.

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Proposed resolution

colorbox_field_formatter needs to be able to work with Colorbox 2.0.0