Enhance filtering and updating for set method#143

sygutss wants to merge 4 commits intodpath-maintainers:masterdpath-maintainers/dpath-python:masterfrom

sygutss:feature/set_filter_not_for_leaves_and_updatesygutss/dpath-python:feature/set_filter_not_for_leaves_and_updateCopy head branch name to clipboard