fix: add support for import.meta.url|resolve

[petermuessig]

With this change we add support for import.meta.url and import.meta.resolve() for the transpilation step of the plugin.

This is how import.meta.url is handled:

// ES syntax:
import.meta.url;

// UI5 AMD-like syntax:
sap.ui.define(["module"], function(module) {

  module.url;

});

This is how import.meta.resolve(...) is handled:

// ES syntax:
import.meta.resolve(...);

// UI5 AMD-like syntax:
sap.ui.define(["require"], function(require) {

  require.toUrl(...);

});

Fixes #103