Refactor to replace is-plain-obj package (#34)

Author: ybiquitous

lib/npm-package-json-lint-config.test.js

@@ -1,24 +1,27 @@
 'use strict';
 
-const isPlainObj = require('is-plain-obj');
 const npmpackagejsonlintConfig = require('./npm-package-json-lint-config');
 
+function isObject(value) {
+	return typeof value === 'object' && value !== null;
+}
+
 describe('npm-package-json-lint config tests', () => {
 	describe('npm-package-json-lint config object', () => {
 		test('should be an object', () => {
-			expect(isPlainObj(npmpackagejsonlintConfig)).toBe(true);
+			expect(isObject(npmpackagejsonlintConfig)).toBe(true);
 		});
 	});
 
 	describe('extends', () => {
 		test('should not be an object', () => {
-			expect(isPlainObj(npmpackagejsonlintConfig.extends)).toBe(false);
+			expect(isObject(npmpackagejsonlintConfig.extends)).toBe(false);
 		});
 	});
 
 	describe('rules', () => {
 		test('should be an object', () => {
-			expect(isPlainObj(npmpackagejsonlintConfig.rules)).toBe(true);
+			expect(isObject(npmpackagejsonlintConfig.rules)).toBe(true);
 		});
 	});
 });

package-lock.json

@@ -59,7 +59,6 @@
     "eslint": "^6.8.0",
     "eslint-config-stylelint": "^12.0.0",
     "husky": "^4.2.5",
-    "is-plain-obj": "^2.1.0",
     "jest": "^28.1.3",
     "lint-staged": "^10.1.3",
     "np": "^6.2.0",