chore: use dequal instead of lodash.isequal

[tatomyr]

What/Why/How?

It's smaller and more performant.

Reference

Testing

Screenshots (optional)

Check yourself

• Code changed? - Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests
• New package installed? - Tested in different environments (browser/node)

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

⚠️ No Changeset found

Latest commit: 88b9539

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[github-actions]

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	984.7 ± 17.3	954.0	1004.5	1.00
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	994.7 ± 20.4	963.0	1031.5	1.01 ± 0.03

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	77.18%	4576/5929
🟡	Branches	67.18%	2526/3760
🟡	Functions	70.72%	751/1062
🟡	Lines	77.43%	4309/5565

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟡	core/src/utils.ts	75.82% (-1.46% 🔻)	65.56%	75%	76.98%
🟡	core/src/bundle.ts	74.84%	62.71%	94.12%	74.84%

Test suite run success

750 tests passing in 105 suites.

Report generated by 🧪jest coverage report action from 88b9539

[RomanHotsiy]

LGTM. Just add a reference to the source of the dequal function.