v1.0.12

Things we fixed

• #3688 Fixed a bug where returnable mixin's update:returnValue event would fire twice (thanks @mr-july)
• #3660 Fixed a bug where v-tab would not be disabled when given the disabled prop
• #3693 Fixed a bug where v-tabs would not recalculate overflow properly (dynamic tabs will now add/remove scroll arrows)
• #3726 Fixed a bug where v-avatar would not align icons correctly (thanks @peluprvi)
• #3693 Fixed a regression where v-btn with the loading prop had a v-progress-circular that was thicker than previous Vuetify versions