Update dependency vuepress to v1.7.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
vuepress	devDependencies	minor	1.5.4 -> 1.7.1

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Release Notes

vuejs/vuepress

v1.7.1

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Bug Fixes

• $core: add missing styles for OutboundLink (#​2662) (e2b6641)
• $core: reference correct canonical Url frontmatter property (fix #​2665) (fbf5e5d)

v1.7.0

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Bug Fixes

• $core: #​2627 Dup ID violates HTML5-4 (#​2650) (931e7d9)
• adds accessibility to code-group component (#​2630) (35865ec)
• scroll hash encoded when non-english chars are used fix #​2633 (#​2639) (5fcbd88)
• textlint bug causing PR's to fail checks fix #​2636 (#​2637) (64e92ca)

Features

• $core: add canonical link to frontmatter (#​2658) (ff6c51a)

v1.6.0

Compare Source

Features

• $theme-default: add code group and code block components (#​2594) (394c4f6)
• $theme-default: inform screen readers link opens in new tab/window (fix #​2601) (#​2603) (8d10119)

1.5.4 (2020-08-23)

Bug Fixes

• $core: decode regularPath when generate router config (fix #​1946) (#​1947) (dd26c7c)
• $shared-utils: fix date parse logic for permalinks (#​2181) (d4d0380)
• $shared-utils: replace diacritics with regex (#​1855) (a03e93d)
• $theme-default: overlap navbar dropdown menus (fix #​2227) (#​2365) (ceb0fa9)
• $theme-default: remove invalidate aria-labelledby on homepage title(#​2277) (94a7de4)

1.5.3 (2020-08-05)

Bug Fixes

• $theme-default: fix editLink for repos hosted on gitlab.com (#​2523) (1c3967c)
• add toml dependencyt to shared-utils (b858a6e)
• regular files should not be executable (#​2535) (ffb8527)
• $theme-default: improve last-updated text color contrast (#​2282) (7ca9fbc)
• allows no rel attribute on external links in the nav (#​2338) (b343cd3)
• $core: style loss under build for package that specifies sideEffects: false (fix #​2350) (#​2471) (7e29900)
• $markdown: line highlighting not working correctly when importing code snippets (#​2441) (d0f2e42)

Features

• $theme-default: add initial open group index option (#​2408) (465ae40)

1.5.2 (2020-06-14)

Bug Fixes

• $core: check if meta is from head before removing it (#​2403) (3c94f71)
• $theme-default: handle algolia search result with Chinese hash (close: #​2431) (#​2432) (6183840)

Features

• $theme-default: allow 'auto' in defined sidebars (close: #​1252) (#​2380) (597f83b)

1.5.1 (2020-06-09)

Bug Fixes

• $core: HMR issue caused by chokidar v3 (close: #​2392) (#​2436) (7e9d0c1)
• $shared-utils: use title variable for homepage (close: #​2247) (#​2307) (869eb8d)

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