jsoncons: upgrade 1.2.0 -> 1.3.0

Changelog:
=============
- Fixed bugs:
    - Added "-Wnull-dereference" to CI and worked around some false positives.
    - Invalid json schema compiled successfully
    - SIGABRT when serialising unmapped enum value
    - Fixed a jmespath issue with parenthesized expressions involving projections (wildcard expressions,
      the flatten operator, slices and filter expressions) where the right parenthesis did not stop the projection.
      For example, given JSON '{"foo" : [[0, 1], [2, 3]]}', the JMESPath query '(foo[*])[0]'
      returned '[0,2]' rather than the correct '[0,1]'.
    - Fixed a 'json_encoder' formatting issue when 'array_object_line_splits' option set to 'line_split_kind::same_line'.

- Implemented new features:
    - JMESPath Lexical Scoping using the new [let expression]
    - JMESPath evaluation now supports late binding of variables to an initial (global) scope
      via parameters.
    - New 'json_options' members 'allow_comments' and 'allow_trailing_comma'. These options should
      be preferred over using an error handler.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/jsoncons/jsoncons_1.3.0.bb

@@ -5,7 +5,7 @@ LICENSE = "BSL-1.0"
 LIC_FILES_CHKSUM = "file://LICENSE;md5=6ee7f7ed2001e4cde4679fdb8926f820"
 
 SRC_URI = "git://github.com/danielaparker/jsoncons.git;protocol=https;branch=master"
-SRCREV = "072d106130fd5d89a405a78b6b0e4f2efc45010d"
+SRCREV = "68fafa1a69367768d7d452d45432048b93ba5c9b"
 
 S = "${WORKDIR}/git"