Bump version to 0.3.0 (#54)

List of changes since v0.2.0:
* Renderer argument for Collagraph is now required (#43)
* Fix an issue with garbage collection icw Qt event loop (#49)
* Render output is now watched instead of props and state to trigger updates (#52)
* Component changes:
    * Add support for events in components (#40)
    * Add support for slots (#42)
* CGX improvements and changes:
    * Improve debugging of python script content of CGX files (#38)
    * Add support for component classes and functions (#36)
    * Template tags that start with a capital or contain a dot are assumed to be component class or function (#36)
    * Add support for slot in template (#44)
    * Fix for simple expressions in v-if and v-for directives (#53)
    * Fix for multiple v-if statements directly following each other (#53)
* PySide renderer improvements
    * Add support for resizing widgets (#36)
    * Add support for QEvents (#36)
    * Allow for widgets as top-level elements (windows) (#36)
    * Add support for changing of widget layouts (#36)
    * Allow for re-rendering top-level widgets (#48)
    * Menus and actions are now 
* Pygfx renderer improvements
    * Cache pygfx package lookups (#36)

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "collagraph"
-version = "0.2.0"
+version = "0.3.0"
 description = "Reactive user interfaces"
 authors = ["Berend Klein Haneveld <[email protected]>", "Korijn van Golen <[email protected]>"]
 license = "MIT"