v0.4.0

@StarArawn

What's Changed

Fixed version in readme. by @StarArawn in #224
Fixed regression with Alignment not being exported. by @StarArawn in #225
Added SVG rendering. by @StarArawn in #226
Fixed sprite bug. by @StarArawn in #227
Added transitions/animations for widgets. by @StarArawn in #228
update book chapter 3 button render system to return bool by @NoahShomette in #213
Help the entity hierarchy to be a bit cleaner for PreviousWidget. by @StarArawn in #230
Added an accordion and fixed some bugs. by @StarArawn in #229
Opacity layers by @StarArawn in #232
KButtonBundle's "styles" prop now accepts font_size by @querat in #231
Fixed warning. by @StarArawn in #233
Resource instead of in by @StarArawn in #234
Various fixes to how we handle font rendering. by @StarArawn in #235
Added box shadows! by @StarArawn in #236
Custom rendering by @StarArawn in #237
Fixed bug by @StarArawn in #238
Fixed issue with clipping by @StarArawn in #239
Correctly cull custom materials with zero sized clips. by @StarArawn in #240
Fixed formatting. by @StarArawn in #241
Fix indexing vertices by @StarArawn in #242
Clippy is here.. by @StarArawn in #243
Fixed an a vs b problem where descendants were not being removed. by @StarArawn in #244
Fixed text color extraction. by @StarArawn in #245
Shader with opacity by @StarArawn in #246

Full Changelog: v0.3.0...v0.4.0