svgfilters 0.4.0

Implementation of various SVG filters.
Documentation
# Change Log
All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](http://keepachangelog.com/)
and this project adheres to [Semantic Versioning](http://semver.org/).

This changelog also contains important changes in dependencies.

## Unreleased

## 0.4.0 - 2021-09-04
### Changed
- `svgfilters::ColorMatrix::Saturate` accepts any positive `f64` value now.

### Removed
- `NormalizedValue`

## 0.3.0 - 2021-03-06
### Added
- no_std support

## 0.2.0 - 2020-07-04
### Changed
- BGRA -> RGBA