Bump is-plain-obj from 2.1.0 to 3.0.0 (#165)

Bumps [is-plain-obj](https://github.com/sindresorhus/is-plain-obj) from 2.1.0 to 3.0.0.
- [Release notes](https://github.com/sindresorhus/is-plain-obj/releases)
- [Commits](sindresorhus/is-plain-obj@v2.1.0...v3.0.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -46,7 +46,7 @@
     "eslint-plugin-unicorn": "^22.0.0",
     "eslint-plugin-vue": "^7.0.1",
     "eslint-plugin-vuejs-accessibility": "^0.5.1",
-    "is-plain-obj": "^2.1.0",
+    "is-plain-obj": "^3.0.0",
     "jest": "^26.5.3",
     "npm-package-json-lint": "^5.1.0",
     "npm-package-json-lint-config-tc": "^4.0.0",