GH-22 Release 1.3.0 update.

[SfenKer]

GENERAL:

• Move project from Maven to Gradle (Kotlin DSL)

ADDED:

• Added particle trap.
• Added development build notification.

FIXED:

• Fixed some reflections that may cause exceptions.
• Fixed booster sometimes not work due to invalid static import.

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IMPORTANT! Some API changes happened and some old methods will be removed in next version!

ADDED:

• API#pluginGitBranch(): String
• API#pluginGitCommit(): String

REPLACEMENTS:

• API#instance: API -> API#apiInstance(): API
• API#getVersion(): String -> API#pluginVersion(): String
• API#getTrapRegistry(): ITrapRegistry -> API#trapRegistryInstance(): ITrapRegistry
• API#getArena(): IArena -> API#arenaInstance(): IArena
• ITrapRegistry#list(): Set<String> -> ITrapRegistry#trapRegistryKeys(): Collection<String>