v2.0.0-alpha.3

• fix(app-ext): Vue compilerOptions - must also include 'pre' tag
• fix(api): correct json api
• fix(ui): copy button props
• fix(app-ext): make compatible with latest Quasar
• fix(ui): use Vue's expose method over vm.proxy
• fix(ui): copy to clipboard for code
• fix(ui): src property does not work
• fix(app-ext): centralize ternary operator