Bump is-plain-obj from 2.0.0 to 2.1.0 (#68)

Bumps [is-plain-obj](https://github.com/sindresorhus/is-plain-obj) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/sindresorhus/is-plain-obj/releases)
- [Commits](sindresorhus/is-plain-obj@v2.0.0...v2.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "eslint-plugin-prettier": "^3.1.1",
     "eslint-plugin-vue": "^6.1.2",
     "eslint-plugin-vue-a11y": "^0.0.31",
-    "is-plain-obj": "^2.0.0",
+    "is-plain-obj": "^2.1.0",
     "jest": "^25.1.0",
     "npm-package-json-lint": "^4.4.0",
     "npm-package-json-lint-config-tc": "^3.0.0",