Changes

• Rename ClickEvent to MouseEvent and add type() to Event (#584)
• Added missed methods to make gdx-backend-bytecoder work (#588)
• Adds more attributes to KeyEvent and MouseEvent (#589)
• Add preventDefault() and WheelEvent (#590)
• Add WebGL classes (#592)
• Enhance window (#598)
• Enhance HTMLImageElement (#596)
• Add HTMLAudioElement (#597)
• Make HTMLImageElement extends HTMLElement (#604)
• Bump slf4j-jcl from 1.7.30 to 1.7.31 (#581)
• Bump maven-dependency-plugin from 3.1.2 to 3.2.0 (#574)
• Bump maven-javadoc-plugin from 3.2.0 to 3.3.0 (#565)
• Bump asm-analysis from 9.1 to 9.2 (#586)
• Bump asm from 9.1 to 9.2 (#585)
• Bump slf4j-api from 1.7.31 to 1.7.32 (#600)
• Bump commons-io from 2.10.0 to 2.11.0 (#595)
• Bump slf4j-jdk14 from 1.7.31 to 1.7.32 (#601)
• Bump slf4j-jcl from 1.7.31 to 1.7.32 (#603)
• Bump jackson-databind from 2.12.3 to 2.12.4 (#593)