chore: bump version to 4.0.3 #1598

Job	Run time
Install on Node.js v18	51s
Install on Node.js v20	46s
Test (Unit) on Node.js v18	1m 13s
Audit on Node.js v18	11s
Test (Unit) on Node.js v20	1m 16s
Test (Integration) on Node.js v18	27m 35s
Audit on Node.js v20	9s
Lint on Node.js v18	1m 2s
Test (Integration) on Node.js v20	27m 44s
Lint on Node.js v20	53s
Test (Integration) on Node.js v18 with L3	20m 23s
Test (Integration) on Node.js v20 with L3	20m 27s
Test (Integration) on Node.js v18 with L3 with custom gas token (16 decimals)	20m 52s
Test (Integration) on Node.js v20 with L3 with custom gas token (16 decimals)	20m 59s
Test (Integration) on Node.js v18 with L3 with custom gas token (18 decimals)	20m 55s
Test (Integration) on Node.js v20 with L3 with custom gas token (18 decimals)	20m 45s
Test (Integration) on Node.js v18 with L3 with custom gas token (20 decimals)	20m 44s
Test (Integration) on Node.js v20 with L3 with custom gas token (20 decimals)	20m 53s
	3h 47m 38s

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