3.0.0-preview.1

# [3.0.0-preview.1](https://github.com/mob-sakai/ParticleEffectForUGUI/compare/v2.3.0...v3.0.0-preview.1) (2020-02-12)

### Bug Fixes

* change the text in the inspector to make it more understandable. ([7ca0b6f](7ca0b6fa34)), closes [#66](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/66)
* editor crashes when mesh is set to null when ParticleSystem.RenderMode=Mesh ([e5ebadd](e5ebadd847)), closes [#69](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/69)
* getting massive errors on editor ([ef82fa8](ef82fa82a6)), closes [#67](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/67)
* heavy editor UI ([d3b470a](d3b470a2be))
* remove a menu to add overlay camera ([f5d3b6e](f5d3b6edb5))
* rotating the particle rect may cause out of bounds ([3439842](3439842119)), closes [#55](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/55)
* scale will be decrease on editor ([0c59846](0c59846f11))
* UI darker than normal when change to linear color space ([db4d8a7](db4d8a742c)), closes [#57](https://github.com/mob-sakai/ParticleEffectForUGUI/issues/57)

### Build System

* update develop environment ([9fcf169](9fcf169cd3))

### Features

* add menu to import sample ([b8b1827](b8b1827318))
* add samples test ([287b5cc](287b5cc832))
* **editor:** add osc package (portable mode) ([6c7f880](6c7f880435))

### BREAKING CHANGES

* update develop environment to Unity 2018.3.
Unity 2018.2 will continue to be supported.

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