fix: #207

copy code from https://github.com/vuejs/component-compiler-utils/blob/master/lib/stylePlugins/scoped.ts#L70
just find out keyframes name from values array

Author: liangweiwen

lib/style-compiler/plugins/scope-id.js

@@ -72,10 +72,11 @@ module.exports = postcss.plugin('add-id', function (opts) {
         if (/-?animation$/.test(decl.prop)) {
           decl.value = decl.value.split(',')
             .map(v => {
-              var vals = v.split(/\s+/)
-              var name = vals[0]
-              if (keyframes[name]) {
-                return [keyframes[name]].concat(vals.slice(1)).join(' ')
+              var vals = v.trim().split(/\s+/)
+              var i = vals.findIndex(val => keyframes[val])
+              if (i !== -1) {
+                vals.splice(i, 1, keyframes[vals[i]])
+                return vals.join(' ')
               } else {
                 return v
               }