fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795
- https://snyk.io/vuln/SNYK-JS-SERIALIZEJAVASCRIPT-6147607

package.json

@@ -21,13 +21,13 @@
 	"dependencies": {
 		"@babel/core": "^7.8.3",
 		"@storybook/addon-knobs": "5.3.21",
-		"@storybook/vue": "5.3.21",
+		"@storybook/vue": "7.6.1",
 		"@tournant/communard": "^2.2.0",
 		"@vue/babel-preset-app": "^4.1.2",
 		"@vue/cli-plugin-babel": "^4.1.2",
 		"@vue/cli-plugin-eslint": "^4.1.2",
 		"@vue/cli-plugin-unit-jest": "^4.1.2",
-		"@vue/cli-service": "^4.1.2",
+		"@vue/cli-service": "^5.0.1",
 		"@vue/eslint-config-standard": "^5.1.0",
 		"@vue/test-utils": "1.0.0-beta.29",
 		"babel-eslint": "^10.0.1",