chore(deps): Upgrade vue-test-utils to v1.0.0-beta.29

What does this MR do?

This upgrades @vue/test-utils from v1.0.0-beta.20 to v1.0.0-beta.29. Here's a list of changes for each version since v1.0.0-beta.20:

1.0.0-beta.29

Bug Fixes

• handle errors in destroy (#1106) (efab983)
• handle options applied by mixins (#1101) (d2f26e8)
• use Vue async option for sync mode (#1062) (4c65dbd)

Code Refactoring

• remove deprecated methods (#1109) (1d1d003)
• remove polyfills (#1110) (ade4398)

BREAKING CHANGES

• Remove polyfills from library
• hasStyle, hasAttribute, hasClass, hasProp, visible, and setComputed removed

1.0.0-beta.28

Bug Fixes

• add custom data to events (#1076) (73f0e91)
• add stub without modifying (#1085) (1f4876e)
• improve filter typing (#1077) (a0528ca)
• keep components when adding stubs (#1075) (5e92c10)
• support registered components in scopedSlots (#1065) (d4c118b)
• use correct event type for checkbox v-model handler (#1083) (ef66c26)

1.0.0-beta.27

Bug Fixes

• fix references to documents in warnings (#1052) (45e2fe4)
• remove cached constructors (#1059) (aea1c94)
• stop stubs leaking with localVue (#1056) (5500553)
• stub dynamic components (#1051) (4338403)

Features

• do not stub unregistered components (#1048) (fb7a66c)

1.0.0-beta.26

Bug Fixes

• docs: replaced unit script with test script (#1001) (1576284)
• add functions to scoped slots typing (#1022) (8db0c20)
• create stubs in render (#1038) (e1fd705), closes #973 #994 #995
• do not remove cached constructors (#962) (71ec3b9)
• render all slots inside a vnode (#979) (c04d3bf)
• stop extending from constructor functions (#1014) (2648213)
• support async components in stubs (#1039) (6a4e19d), closes #1026
• use correct event interface (#977) (8771b8f)

Features

• pass listeners to functional components (#1036) (7a1a49e)
• support lazily added components (#1005) (3653c60)
• undefined attributes parsed as $attrs (#1029) (0d3e46d)

BREAKING CHANGES

• The tag name rendered by snapshots will use the rendered component tag, rather than the registered component name

1.0.0-beta.25

Bug Fixes

• handle global stubs and functional extended components (#943) (0d1ddd1)
• improve emitted type (#933) (3049c3e)
• render all children (#931) (71a2e7b)
• throw error if unsupported options passed in vue < 2.3 (#910) (e8d9547)

Features

• wrapper: add support for getting prop, attribute and classes by key (#941) (9bb9a87)

Performance Improvements

• use extends over createLocalVue (#934) (af45a9d)

1.0.0-beta.24

Bug Fixes

• handle null in set data (#896) (44c4520)
• reconcile the overridden prototype of component with _Vue mixins (#889) (73980c4)
• render classes of functional component stubs (#898) (11cfee2)
• wrap extended child components (#840) (4faf5fb)

Features

• support scopedSlots mounting option for functional component (#893) (7a04ff4)

1.0.0-beta.23

Bug Fixes

• add stubs/mocks to extended components (#881) (862ce5c)

1.0.0-beta.22

Bug Fixes

• remove incorrect test (#847) (e9374b8)
• add unused propsData as component attributes (#865) (c747cd6)
• clear static tree for slots render (#862) (c7ac0d9)
• handle dynamic imports (#864) (4e739bd)
• keep the overrides prototype information of component (#856) (0371793)
• render children for functional component stubs (#860) (e2e48dc)
• stub globally registered components (#859) (5af3677)
• support multiple default slot nodes (#861) (85dd3ec)

Features

• add support for JSX scopedSlots value (#871) (13bcaeb)
• export createWrapper method to create wrapper from instance (#868) (ebca3b3)
• export wrapper class (#866) (c212ebf)
• render props on auto stubs (#834) (8db502d)

1.0.0-beta.21

Bug Fixes

• broken links for deprecated methods (#786) (5bb6a0b)
• types: remove unnecessary method (#755) (2068208)
• allow extended components as stubs (#825) (65449b3)
• extend extended child components (#757) (bc5aba3)
• fix type of wrapper.vm (#759) (ff5220d)
• handle cloneDeep errors in createLocalVue (#844) (17dfdc8)
• handle textarea correctly in setValue() and setChecked() (#771) (4c9fe3c)
• handle unnamed parent and child components (#768) (71a2ac4)
• improve scopedSlots option (#808) (b946997)
• improve slots option (#813) (5fecbd2)
• recursively call Vue.set in setData (#843) (ef01abf)
• setProps() throws an error if the property is the same reference (#791) (bf655f3)
• stubs extended component correctly (#767) (24ab4c5)
• support setValue on textarea (#764) (e83cda2)
• update props when watcher depends on value (#842) (2aeaee3)
• use boolean for VueWrapper (#763) (6fa6ecd)
• use for in to stub components on prototype (#845) (b6a3659)

Features

• add parentComponent option (#846) (1951409)
• enabled slots option to take class components (#826) (4916fed)
• render slots by default (#782) (1ad731e)
• use setValue() on select element (#837) (2e6de7b)

Specifically, scoped slots testing has been improved, which would be helpful for testing slots in !259 (merged)