Nothing fancy, just some handy improvements and nice bug fixes:

• define: Disallow executing defined functions after calling define_free (#141)
• fileio: Fix buffer reallocation in fileio_scan (#149 by @Alexk-195)
• uuid: Allow setting an explicit timestamp in uuid7 (#143 by @umeldt)
• vsv: Do not ignore empty fields in the first row (#139)
• Respect CC and CFLAGS in Makefile (#136 by @herbygillot)

Huge thanks to all Sqlean contributors!