fix(deps): update dependency vue-router to v4

package.json

@@ -14,7 +14,7 @@
     "core-js": "^3.9.0",
     "particles.vue": "^3.0.0",
     "vue": "^2.6.13",
-    "vue-router": "^3.5.2"
+    "vue-router": "^4.0.0"
   },
   "devDependencies": {
     "@vue/cli-plugin-babel": "~4.5.9",

yarn.lock

@@ -1406,6 +1406,11 @@
   optionalDependencies:
     prettier "^1.18.2"
 
+"@vue/devtools-api@^6.4.5":
+  version "6.5.0"
+  resolved "https://registry.yarnpkg.com/@vue/devtools-api/-/devtools-api-6.5.0.tgz#98b99425edee70b4c992692628fa1ea2c1e57d07"
+  integrity sha512-o9KfBeaBmCKl10usN4crU53fYtC1r7jJwdGKjPT24t348rHxgfpZ0xL3Xm/gLUYnc0oTp8LAmrxOeLyu6tbk2Q==
+
 "@vue/preload-webpack-plugin@^1.1.0":
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/@vue/preload-webpack-plugin/-/preload-webpack-plugin-1.1.2.tgz#ceb924b4ecb3b9c43871c7a429a02f8423e621ab"
@@ -8475,10 +8480,12 @@ vue-property-decorator@^9.1.2:
   resolved "https://registry.yarnpkg.com/vue-property-decorator/-/vue-property-decorator-9.1.2.tgz#266a2eac61ba6527e2e68a6933cfb98fddab5457"
   integrity sha512-xYA8MkZynPBGd/w5QFJ2d/NM0z/YeegMqYTphy7NJQXbZcuU6FC6AOdUAcy4SXP+YnkerC6AfH+ldg7PDk9ESQ==
 
-vue-router@^3.5.2:
-  version "3.5.2"
-  resolved "https://registry.yarnpkg.com/vue-router/-/vue-router-3.5.2.tgz#5f55e3f251970e36c3e8d88a7cd2d67a350ade5c"
-  integrity sha512-807gn82hTnjCYGrnF3eNmIw/dk7/GE4B5h69BlyCK9KHASwSloD1Sjcn06zg9fVG4fYH2DrsNBZkpLtb25WtaQ==
+vue-router@^4.0.0:
+  version "4.1.6"
+  resolved "https://registry.yarnpkg.com/vue-router/-/vue-router-4.1.6.tgz#b70303737e12b4814578d21d68d21618469375a1"
+  integrity sha512-DYWYwsG6xNPmLq/FmZn8Ip+qrhFEzA14EI12MsMgVxvHFDYvlr4NXpVF5hrRH1wVcDP8fGi5F4rxuJSl8/r+EQ==
+  dependencies:
+    "@vue/devtools-api" "^6.4.5"
 
 vue-style-loader@^4.1.0, vue-style-loader@^4.1.2:
   version "4.1.2"