0.4.18

• Compatibility fix for roxygen2 7.3.1
• Fix bug when reading a control stream and using $PROB instead of $PROBLEM (@AndreasCalvagone, #222)
• Introduced check_ext argument in xpose_data(), read_nm_model(), to bypass the strict NONMEM model format check if needed.
• xpose now recognizes PATAB, COTAB, CATAB table names as patab, cotab, and catab types respectively (@certara-mtomashevskiy, #221)
• Small documentation fixes and improvements