Update json-lib module
Added toString and toPrettyStrong method for JsonValue
Fix indention on empty object
Fix number parsing of decimals
Fix number parsing of 0
Bump up version to 2.1.7
Added toString and toPrettyStrong method for JsonValue
Fix indention on empty object
Fix number parsing of decimals
Fix number parsing of 0
Bump up version to 2.1.7