fix: align push helpers to matched_count for success-contract consistency (v0.1.3)

mongo-1: document_push_array and document_push_and_set still returned modified_count>0
while the v0.1.2 wave moved the sibling single-doc update helpers to matched_count>0.
$push always mutates so the two agree in practice (no reachable behavioral change), but
the helpers now match the documented 'True when a document matched' contract uniformly.

sibling-grep: zero consumers of either push helper.
Signed-off-by: disqualifier <dev@disqualifier.me>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "mongo"
-version = "0.1.2"
+version = "0.1.3"
 description = "async mongodb wrapper over motor with a raw escape hatch"
 requires-python = ">=3.10"
 dependencies = [