libyang: Update to version 2.1.148

libyang: Update to version 2.1.148

- Update from version 2.1.4 to 2.1.148
- Update of rootfile
- Minimum version of 2.1.128 will be required in a future frr release and currently needs
   to be a minimum of 2.1.80 but not 2.1.111
- Changelog
    2.1.148
	Main changes of this release are:
	    lots of bugfixes and improvements in various parts of the library
    2.1.128
	Main changes of this release are:
	    revert of identityref canonical value change
	        the identity always printed with the module name as the prefix
	    data tree and hash table optimizations
	    opaque node handling fixes and improvements
	    lots of other bug fixes
    2.1.111
	Main changes of this release are:
	    opaque node parsing improved
	    native RESTCONF operation parsing support
	    union value error reporting improved
	    new yanglint and yangre tests
	    optional support for leafref with XPath functions
	    lots of other fixes and improvements
    2.1.80
	Main changes of this release are:
	    RESTCONF message parsing
	    JSON parser refactor
	    timezone DST handling
	    public hash table API
	    stored union value bugfix
	    many other clarifications, improvements, and bugfixes
    2.1.55
	Main changes of this release are:
	    type compilation fixes
	    multi-error validation support
	    JSON parser fixes
	    portability improvements
	    schema-mount support improvements
	    minor optimizations
	    other minor fixes
    2.1.30
	Main changes of this release are:
	    many JSON printer/parser fixes and improvements
	    unintentionally large library size reduced
	    thread safety improvements
	    big-endian compatibility fix
	    uncrustify updated
	    lots of other fixes and improvements

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>