chore: exclude include-flate when unnecessary

[tisonkun]

cc @messense

[tisonkun]

OT: In my use case I don't need default-dict. So I wonder if we can make it out of default. Also I'm against using default since users can always opt-in feature they want, but a default bundle can often cause unexpected code and break dev flow.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.34%. Comparing base (f38a1eb) to head (6e0be04).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #132   +/-   ##
=======================================
  Coverage   83.34%   83.34%           
=======================================
  Files           9        9           
  Lines        1759     1759           
=======================================
  Hits         1466     1466           
  Misses        293      293           

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[codspeed-hq]

CodSpeed Performance Report

Merging #132 will not alter performance

_{Comparing tisonkun:reduce-deps (6e0be04) with main (f38a1eb)}

Summary

✅ 12 untouched benchmarks

[messense]

Without default dict, a simple cargo add jieba-rs workflow does not work out of box which is not good UX I think?

[tisonkun]

@messense there is a flag --features

Let me see if I can make a proper feature, docs, and methods improvement.

[tisonkun]

@messense since include-flate has an advisory item:

error[unmaintained]: proc-macro-error is unmaintained
    ┌─ /path/to/Cargo.lock:423:1
    │
423 │ proc-macro-error 1.0.4 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ unmaintained advisory detected
    │
    ├ ID: RUSTSEC-2024-0370
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2024-0370
    ├ proc-macro-error's maintainer seems to be unreachable, with no commits for 2 years, no releases pushed for 4 years, and no activity on the GitLab repo or response to email.
      
      proc-macro-error also depends on `syn 1.x`, which may be bringing duplicate dependencies into dependant build trees.
      
      ## Possible Alternative(s)
      
      - [manyhow](https://crates.io/crates/manyhow)
      - [proc-macro-error2](https://crates.io/crates/proc-macro-error2)
      - [proc-macro2-diagnostics](https://github.com/SergioBenitez/proc-macro2-diagnostics)
    ├ Announcement: https://gitlab.com/CreepySkeleton/proc-macro-error/-/issues/20
    ├ Solution: No safe upgrade is available!
    ├ proc-macro-error v1.0.4
      └── include-flate-codegen v0.3.1
          └── include-flate v0.3.1
              └── jieba-rs v0.8.1

I wonder if it's possible to release a new version (maybe 0.8.2) with this patch included.