Update dependency vite-plugin-vue2 to v1.8.0 (#646)

Reviewed-on: vikunja/frontend#646
Co-authored-by: renovate <renovatebot@kolaente.de>
Co-committed-by: renovate <renovatebot@kolaente.de>

package.json

@@ -66,7 +66,7 @@
     "typescript": "4.3.5",
     "vite": "2.4.4",
     "vite-plugin-pwa": "0.10.0",
-    "vite-plugin-vue2": "1.7.3",
+    "vite-plugin-vue2": "1.8.0",
     "vue-flatpickr-component": "8.1.7",
     "vue-notification": "1.3.20",
     "vue-router": "3.5.2",

yarn.lock

@@ -312,7 +312,7 @@
     "@babel/helper-plugin-utils" "^7.14.5"
     "@babel/plugin-syntax-class-static-block" "^7.14.5"
 
-"@babel/plugin-proposal-decorators@^7.8.3":
+"@babel/plugin-proposal-decorators@^7.14.5", "@babel/plugin-proposal-decorators@^7.8.3":
   version "7.14.5"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-decorators/-/plugin-proposal-decorators-7.14.5.tgz#59bc4dfc1d665b5a6749cf798ff42297ed1b2c1d"
   integrity sha512-LYz5nvQcvYeRVjui1Ykn28i+3aUiXwQ/3MGoEy0InTaz1pJo/lAzmIDXX+BQny/oufgHzJ6vnEEiXQ8KZjEVFg==
@@ -8107,13 +8107,15 @@ vite-plugin-pwa@0.10.0:
     workbox-build "^6.1.5"
     workbox-window "^6.1.5"
 
-vite-plugin-vue2@1.7.3:
-  version "1.7.3"
-  resolved "https://registry.yarnpkg.com/vite-plugin-vue2/-/vite-plugin-vue2-1.7.3.tgz#6c4da246800493283be37b321c2d5041cf9c9f71"
-  integrity sha512-HStclmWA4rQKy6xH1tEniUvoiCAForBZSC6JBO189sB2LoGUhiA7414Cr1RnysDp/ZDnW/PwG+ux+VfXrYP6Ow==
+vite-plugin-vue2@1.8.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/vite-plugin-vue2/-/vite-plugin-vue2-1.8.0.tgz#f336cd58de7187c5347f74d49b56291300ce8942"
+  integrity sha512-7/4FQBYcGBzBvdcgh4sscQc4FLQumM8cjwlmMi514uNOSwJiG0jSl47Vwajn8s8k9X3itqaNBy+EGod2720GsQ==
   dependencies:
     "@babel/core" "^7.11.6"
     "@babel/parser" "^7.13.10"
+    "@babel/plugin-proposal-class-properties" "^7.14.5"
+    "@babel/plugin-proposal-decorators" "^7.14.5"
     "@babel/plugin-transform-typescript" "^7.13.0"
     "@rollup/pluginutils" "^4.1.0"
     "@vue/babel-helper-vue-jsx-merge-props" "^1.2.1"