feat!: update to client v7

[lihbr]

Types of changes

• [ ] Chore (a non-breaking change which is related to package maintenance)
• [ ] Bug fix (a non-breaking change which fixes an issue)
• [x] New feature (a non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to change)

Description

This PR updates the version of @prismicio/client run by the Vue plugin. It inherits the breaking changes coming with @prismicio/client v7, but also the new features and performance improvements.

Checklist:

• [x] My change requires an update to the official documentation.
• [x] All TSDoc comments are up-to-date and new ones have been added where necessary.
• [x] All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #64 (3989c61) into master (5ced89b) will decrease coverage by 0.41%. The diff coverage is 88.00%.

:exclamation: Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@            Coverage Diff             @@
##           master      #64      +/-   ##
==========================================
- Coverage   99.84%   99.44%   -0.41%     
==========================================
  Files          19       19              
  Lines        3186     3229      +43     
  Branches      136      140       +4     
==========================================
+ Hits         3181     3211      +30     
- Misses          5       18      +13     

Impacted Files	Coverage Δ
src/createPrismic.ts	91.27% <72.72%> (-8.73%)	:arrow_down:
src/components/PrismicEmbed.ts	100.00% <100.00%> (ø)
src/components/PrismicImage.ts	100.00% <100.00%> (ø)
src/components/PrismicLink.ts	100.00% <100.00%> (ø)
src/components/PrismicRichText.ts	100.00% <100.00%> (ø)
src/components/PrismicText.ts	100.00% <100.00%> (ø)
src/components/SliceZone.ts	99.64% <100.00%> (ø)
src/composables.ts	100.00% <100.00%> (ø)
src/types.ts	100.00% <100.00%> (ø)