fix: switch lazy loading images to eager

[DustinBrett]

I noticed an issue with my images not loading. I traced it to neither onload or onerror firing during the embedImageNode step, which I was able to fix by changing the loading (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-loading) attribute to eager instead of lazy as my images are.

Description

Add a condition during embedImageNode that changes lazy loading images to eager to ensure (ideally) that onload/onerror fires.

Motivation and Context

This problem occurs at least for me when I have an img which has loading (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#attr-loading) set to lazy. Changing this to eager stops the problem, so I've made this adjustment occur during cloning as we would not want to lazy loading images when we are trying to clone them and are waiting for them to finish decoding/loading.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Enhancement (changes that improvement of current feature or performance)
• [ ] Refactoring (changes that neither fixes a bug nor adds a feature)
• [ ] Test Case (changes that add missing tests or correct existing tests)
• [ ] Code style optimization (changes that do not affect the meaning of the code)
• [ ] Docs (changes that only update documentation)
• [ ] Chore (changes that don't modify src or test files)

Self Check before Merge

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[codecov[bot]]

Codecov Report

Base: 63.24% // Head: 63.24% // No change to project coverage :thumbsup:

Coverage data is based on head (ce892e6) compared to base (1933175). Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #359 +/- ## ======================================= Coverage 63.24% 63.24% ======================================= Files 10 10 Lines 555 555 Branches 129 129 ======================================= Hits 351 351 Misses 146 146 Partials 58 58 ``` | [Impacted Files](https://codecov.io/gh/bubkoo/html-to-image/pull/359?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%B4%96) | Coverage Δ | | |---|---|---| | [src/embed-images.ts](https://codecov.io/gh/bubkoo/html-to-image/pull/359?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%B4%96#diff-c3JjL2VtYmVkLWltYWdlcy50cw==) | `81.81% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%B4%96). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%B4%96)

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[vivcat[bot]]

:tada: This PR is included in version 1.11.5 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: