v1.3.6 CRAN release

• Update: Add event, count_by option in TableSubgroupCox, TableSubgroupMultiCox
• Update: Add pairwise option in CreateTableOne2, CreateTableOneJS, svyCreateTableOne2, svyCreateTableOneJS
• Update: Add labeldata option in TableSubgroupGLM, TableSubgroupMultiGLM, TableSubgroupCox, TableSubgroupMultiCox
• Fix: cox2.display HR