feat(bundle-utils,unplugin-vue-i18n): pkg option for getVueI18nVersion (#369)

* feat(bundle-utils): pkg option for `getVueI18nVersion`

* fix(unplugin-vue-i18n): remove vue-i18n version checking

Author: kazupon

packages/bundle-utils/src/deps.ts

@@ -36,16 +36,16 @@ export function checkInstallPackage(
   )
 }
 
-type VueI18nVersion = '8' | '9' | 'unknown' | ''
+type VueI18nVersion = '9' | 'unknown' | ''
 
-export function getVueI18nVersion(debug: Function): VueI18nVersion {
-  const VueI18n = loadModule('vue-i18n', debug)
+export function getVueI18nVersion(
+  debug: Function,
+  pkg = 'vue-i18n'
+): VueI18nVersion {
+  const VueI18n = loadModule(pkg, debug)
   if (VueI18n == null) {
     return ''
   }
-  if (VueI18n.version && VueI18n.version.startsWith('8.')) {
-    return '8'
-  }
   if (VueI18n.VERSION && VueI18n.VERSION.startsWith('9.')) {
     return '9'
   }

packages/unplugin-vue-i18n/src/index.ts

@@ -41,10 +41,6 @@ const debug = createDebug('unplugin-vue-i18n')
 const installedPkg = checkInstallPackage('@intlify/unplugin-vue-i18n', debug)
 const vueI18nVersion = getVueI18nVersion(debug)
 
-if (vueI18nVersion === '8') {
-  warn(`vue-i18n@8 is not supported, since sinece Vue 2 was EOL on 2023.`)
-}
-
 export const unplugin = createUnplugin<PluginOptions>((options = {}, meta) => {
   debug('plugin options:', options, meta.framework)