fix: floor retry/aretry attempts at 1 (v0.2.1)

retry(fn, attempts=0) (or negative) silently returned None without ever calling fn,
looking like success. floor attempts at max(1, attempts) so the callable always runs
at least once; a failing call now fails loud after one try instead of no-op None.

verified: attempts=0/-5 -> 1 call (sync + async); failing fn raises after 1 try;
31/31 retry regression intact.

Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "commons"
-version = "0.2.0"
+version = "0.2.1"
 description = "small stdlib-only sync helpers: time/timezone deltas, dotted-path dict access, display masking, ip/address tooling, and retry/backoff"
 requires-python = ">=3.10"
 dependencies = []