Fix deepEqual helper function

[afshinm]

Fixes #1411

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟢	Statements	81.2% (+0.14% 🔼)	1352/1665
🟡	Branches	67.77% (+0.47% 🔼)	368/543
🟢	Functions	81.9%	285/348
🟢	Lines	80.79% (+0.13% 🔼)	1190/1473

Show files with reduced coverage 🔻

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St.^{:grey_question:}

| File | Statements | Branches | Functions | Lines | | :----------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------- | :----------------------------------------------------- | :------------------------------------------------------------ | :-------- | :----------------------------------------------------------- | | 🟢 | util/deepEqual.ts |

92% (-8% 🔻)

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85.71% (-14.29% 🔻)

| 100% |

90.91% (-9.09% 🔻)

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Test suite run success

191 tests passing in 34 suites.

Report generated by 🧪jest coverage report action from 054c961970c628850197b6457d4215a789feeddf

[github-actions[bot]]

Size Change: +801 B (+1%)

Total Size: 95.4 kB

Filename	Size	Change
dist/gridjs.js	16.5 kB	+96 B (+1%)
dist/gridjs.module.js	16.5 kB	+90 B (+1%)
dist/gridjs.production.es.min.js	16.5 kB	+90 B (+1%)
dist/gridjs.production.min.js	16.5 kB	+95 B (+1%)
dist/gridjs.umd.js	16.5 kB	+95 B (+1%)
l10n/dist/l10n.js	3.16 kB	+109 B (+4%)
l10n/dist/l10n.module.js	3.25 kB	+116 B (+4%)
l10n/dist/l10n.umd.js	3.29 kB	+110 B (+3%)

ℹ️ View Unchanged

| Filename | Size | | :--- | :---: | | `plugins/selection/dist/selection.js` | 1.05 kB | | `plugins/selection/dist/selection.module.js` | 1.07 kB | | `plugins/selection/dist/selection.umd.js` | 1.15 kB |

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