Bump to plugin-spi 0.3.0 (#2390)

Author: dualspiral

build.gradle.kts

@@ -29,6 +29,7 @@ val mathVersion: String by project
 dependencies {
     val caffeineVersion: String by project
     val errorproneVersion: String by project
+    val pluginSpiVersion: String by project
 
     // Directly tied to what's available from Minecraft
     api("org.apache.logging.log4j:log4j-api:$log4jVersion")
@@ -78,7 +79,7 @@ dependencies {
     }
 
     // Plugin spi, includes plugin-meta
-    api("org.spongepowered:plugin-spi:0.2.1-SNAPSHOT")
+    api("org.spongepowered:plugin-spi:$pluginSpiVersion")
 
     // Configurate
     api(platform("org.spongepowered:configurate-bom:$configurateVersion"))

gradle.properties

@@ -12,3 +12,4 @@ configurateVersion=4.1.2
 errorproneVersion=2.8.1
 log4jVersion=2.8.1
 mathVersion=2.0.1
+pluginSpiVersion=0.3.0

src/main/java/org/spongepowered/api/asset/Asset.java

@@ -26,7 +26,7 @@
 
 import com.google.common.io.Resources;
 import org.spongepowered.plugin.PluginContainer;
-import org.spongepowered.plugin.jvm.Plugin;
+import org.spongepowered.plugin.builtin.jvm.Plugin;
 
 import java.io.IOException;
 import java.io.InputStream;