Fix incorrect fzf minimum-version comparison

[shaked-shlomo]

Problem

The minimum supported fzf version is 0.23.1 (MIN_FZF_VERSION_*), but the check in src/finder/mod.rs ANDs the three components independently:

if major == MIN_FZF_VERSION_MAJOR   // == 0
    && minor < MIN_FZF_VERSION_MINOR // < 23
    && patch < MIN_FZF_VERSION_PATCH // < 1  (i.e. patch == 0)
{

patch < 1 is only true when patch == 0, so the warning fires for the wrong set of versions:

fzf version	older than 0.23.1?	current check fires?
0.22.0	yes	✅ yes
0.22.5	yes	❌ no (5 < 1 is false)
0.23.0	yes	❌ no (23 < 23 is false)
0.23.1	no	✅ no
1.0.0	no	✅ no

So users on common too-old versions like 0.22.x (x≥1) or 0.23.0 silently skip the warning, while only *.*.0 versions are caught.

Fix

Compare the version tuples lexicographically (Rust tuples already implement Ord this way), which correctly flags any version below the minimum:

if (major, minor, patch)
    < (MIN_FZF_VERSION_MAJOR, MIN_FZF_VERSION_MINOR, MIN_FZF_VERSION_PATCH)
{

No behavior change for versions ≥ 0.23.1; it only fixes the missed older versions.

[welcome]

Thanks for opening this pull request!