Fix "eager: true emits require (doesn't exist in browsers) instead of import"

[ArnaudWeyts]

What:

Fixes #57

Why:

We expect import to be used instead of require:

const __glob__0_0 = require("./scenarios/baseline-handlebars-list.gjs");
const __glob__0_1 = require("./scenarios/baseline-inner-html.gjs");
const __glob__0_2 = require("./scenarios/ember-get.gjs");
const definedScenarios = {
  "./scenarios/baseline-handlebars-list.gjs": __glob__0_0,
  "./scenarios/baseline-inner-html.gjs": __glob__0_1,
  "./scenarios/ember-get.gjs": __glob__0_2
};

should be

import __glob__0_0 from "./scenarios/baseline-handlebars-list.gjs";
import  __glob__0_1 from "./scenarios/baseline-inner-html.gjs";
import  __glob__0_2 from "./scenarios/ember-get.gjs";
const definedScenarios = {
  "./scenarios/baseline-handlebars-list.gjs": __glob__0_0,
  "./scenarios/baseline-inner-html.gjs": __glob__0_1,
  "./scenarios/ember-get.gjs": __glob__0_2
};

This is already listed in the documentation.

How:

Adapted the transformer and tests.

Checklist:

• Documentation updated
• Tests
• Ready to be merged
  
• Added myself to contributors table