This allows fusing nested `.padding` modifiers into a single `div` that sums up padding values from all these modifiers.
Before:
```swift
Text("text").padding(10).padding(20)
```
rendered to this (text styling omitted for brevity):
```html
<div style="padding-top: 20.0px; padding-left: 20.0px; padding-bottom: 20.0px; padding-right: 20.0px;">
<div style="padding-top: 10.0px; padding-left: 10.0px; padding-bottom: 10.0px; padding-right: 10.0px;">
<span>text</span>
</div>
</div>
```
Now it renders as
```html
<div style="padding-top: 30.0px; padding-left: 30.0px; padding-bottom: 30.0px; padding-right: 30.0px;">
<span>text</span>
</div>
```
I hope this approach could be applied to other modifier combinations where it makes sense (in separate PRs).
* Attempt `padding` modifier fusion
* Fix linter warning
* Add a test to verify that fusion works
* Enable fusion of modifiers nested three times
* Filter out empty attributes
* Run snapshot tests only on macOS for now
* Fully exclude snapshot testing on WASI
* Fix `testOptional` snapshot
* Clean up code formatting
Resolves#404.
This also allows us to write more tests that are source-compatible with SwiftUI.
* Use `CGFloat`, `CGPoint`, `CGRect` from Foundation
* Fix GTK build
* Fix macOS build
Carson Katri