chore(deps): pin dependencies

This PR contains the following updates:

Package	Type	Update	Change
@iktakahiro/markdown-it-katex	devDependencies	pin	`^4.0.0` -> `4.0.0`
@vuepress/plugin-blog	devDependencies	pin	`^1.9.2` -> `1.9.2`
@vuepress/plugin-medium-zoom	devDependencies	pin	`^1.5.4` -> `1.5.4`
generate-robotstxt	devDependencies	pin	`^8.0.3` -> `8.0.3`
tiny-pinyin	devDependencies	pin	`^1.3.0` -> `1.3.0`
vue-google-adsense (source)	devDependencies	pin	`^1.8.3` -> `1.8.3`
vue-script2	devDependencies	pin	`^2.1.0` -> `2.1.0`
vuepress	devDependencies	pin	`^1.7.1` -> `1.7.1`
vuepress-plugin-autometa	devDependencies	pin	`^0.1.13` -> `0.1.13`
vuepress-plugin-git-log (source)	devDependencies	pin	`^1.0.1` -> `1.0.1`
vuepress-plugin-mailchimp	devDependencies	pin	`^1.4.2` -> `1.4.2`
vuepress-plugin-medium-zoom	devDependencies	pin	`^1.1.8` -> `1.1.8`
vuepress-plugin-sitemap	devDependencies	pin	`^2.3.1` -> `2.3.1`

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lucifer1004 / cp-wiki

chore(deps): pin dependencies #31

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