jguhlin/minimap2-rs: Minimap2-rs 0.1.30 and minimap2-sys 0.1.30

0.1.30 minimap2 2.30 (UNRELEASED) Fix: Check the return value of mm_set_opt @sjackman Fix: Use std::ptr::null() instead of &0 for null pointer arguments @sjackman Fix: Update Preset::Asm to map to "asm5" instead of "asm" for minimap2 2.30 compatibility Update rust-htslib requirement from 0.50 to 0.51 Rename some C functions to reduce clobbering