fix(deps): update dependency com.networknt:json-schema-validator to v1.5.4

This MR contains the following updates:

Package	Type	Update	Change
com.networknt:json-schema-validator	compile	patch	1.5.3 -> 1.5.4

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Release Notes

networknt/json-schema-validator (com.networknt:json-schema-validator)

v1.5.4

Compare Source

Added

Changed

• Fix nullable issue (#​1134) Thanks @​justin-tay
• fixes #​1131 pom.xml scm url URI is invalid (#​1132)
• Remove warning for exclusiveMinimum and exclusiveMaximum for Draft 4 (#​1127) Thanks @​justin-tay
• Clean up code (#​1130) Thanks @​jkosternl
• Test Code Cleanup (#​1128) Thanks @​jkosternl

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