Support cs_disasm_iter

[dnsserver]

What do you think about this API?

[tmfink]

This is a big improvement over the last PR. 😄

Overall, I like the approach of having separate type to "own" the cs_insn allocation. I also like how DisasmIter tracks the "updates" from repeated calls to cs_disasm_iter().

I have some comments that I will make in-line.

[tmfink]

we don't need to take an offset; the user can just adjust the code slice as they want:

let new_code = &code[3..];

[dnsserver]

It will get a bit tricky to handle the iteration within the loop without an offset ( cur_insn = disasm.disasm_iter_continue(&buf); ). Would it be too much to ask to keep the offset ?

[tmfink]

I just pushed a fix (#116) for the GitHub action failure; please rebase to the current master branch to get the fix.

[codecov]

Codecov Report

Merging #115 (1e57323) into master (854de72) will not change coverage.
The diff coverage is n/a.

❗ Current head 1e57323 differs from pull request most recent head 06dbfb6. Consider uploading reports for the commit 06dbfb6 to get more accurate results

@@           Coverage Diff           @@
##           master     #115   +/-   ##
=======================================
  Coverage   94.90%   94.90%           
=======================================
  Files          22       22           
  Lines        2670     2670           
=======================================
  Hits         2534     2534           
  Misses        136      136           

Impacted Files	Coverage Δ
capstone-rs/src/capstone.rs	93.52% <ø> (ø)

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