Support Aseprite export format (.json) for animations

build.gradle

@@ -49,6 +49,8 @@ dependencies {
     implementation 'com.sun.xml.bind:jaxb-core:2.3.0.1'
     implementation 'com.sun.xml.bind:jaxb-impl:2.3.2'
 
+    implementation 'com.google.code.gson:gson:2.8.6'
+
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.6.0'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.6.0'