Bug Fixed

• Fix Http cache file io error https://github.com/openkraken/kraken/pull/1202.
• Fix align-self not work for positioned flex item. https://github.com/openkraken/kraken/pull/1207
• Fix text-align should only work for text node for flex item. https://github.com/openkraken/kraken/pull/1208
• Fix crash with scrolling. https://github.com/openkraken/kraken/pull/1209
• Fix children of inline-block element not stretch. https://github.com/openkraken/kraken/pull/1214
• Fix style set to empty string. https://github.com/openkraken/kraken/pull/1220
• Fix flex item not stretch when child size changed. https://github.com/openkraken/kraken/pull/1229
• Fix html parse error. https://github.com/openkraken/kraken/pull/1231
• Fix asset protocol error. https://github.com/openkraken/kraken/pull/1232
• Fix file protocol. https://github.com/openkraken/kraken/pull/1234