fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LODASH-6139239

Author: snyk-bot

package.json

@@ -14,7 +14,7 @@
     "axios": "^0.19.0",
     "core-js": "^2.6.5",
     "element-ui": "^2.11.1",
-    "lodash": "^4.17.14",
+    "lodash": "^4.17.17",
     "vue": "^2.6.10",
     "vue-class-component": "^7.0.2",
     "vue-perfect-scrollbar": "^0.1.0",