Break Changes

fix: change default font size from 14px to 16px https://github.com/openkraken/kraken/pull/145

Bug Fixed fix: modify customevent to event https://github.com/openkraken/kraken/pull/138 fix: layout performance https://github.com/openkraken/kraken/pull/155 fix: fix elements created by new operator didn't have ownerDocument. https://github.com/openkraken/kraken/pull/178 fix: flex-basis rule https://github.com/openkraken/kraken/pull/176 fix: transform functions split error when more than one. https://github.com/openkraken/kraken/pull/196 fix: Fix the crash caused by navigation in dart https://github.com/openkraken/kraken/pull/249 fix update device_info 1.0.0 https://github.com/openkraken/kraken/pull/262