[stable28] chore(deps): audit dependencies

[Antreesy]

Rest is not fixable with Vue 2.7

# npm audit report

postcss  <8.4.31
Severity: moderate
PostCSS line return parsing error - https://github.com/advisories/GHSA-7fh5-64p2-3v2j
No fix available
node_modules/@vue/component-compiler-utils/node_modules/postcss
  @vue/component-compiler-utils  *
  Depends on vulnerable versions of postcss
  node_modules/@vue/component-compiler-utils
    vue-loader  15.0.0-beta.1 - 15.11.1
    Depends on vulnerable versions of @vue/component-compiler-utils
    node_modules/vue-loader
      @nextcloud/webpack-vue-config  *
      Depends on vulnerable versions of vue-loader
      node_modules/@nextcloud/webpack-vue-config

4 moderate severity vulnerabilities