[regex] Update to 2026.2.19 (#15439)

Author: brianschubert

stubs/regex/METADATA.toml

@@ -1,2 +1,2 @@
-version = "2026.1.15"
+version = "2026.2.19"
 upstream_repository = "https://github.com/mrabarnett/mrab-regex"

stubs/regex/regex/__init__.pyi

@@ -10,6 +10,7 @@ __all__ = [
     "finditer",
     "fullmatch",
     "match",
+    "prefixmatch",
     "purge",
     "search",
     "split",

stubs/regex/regex/_main.pyi

@@ -21,6 +21,7 @@ __all__ = [
     "finditer",
     "fullmatch",
     "match",
+    "prefixmatch",
     "purge",
     "search",
     "split",
@@ -133,6 +134,9 @@ def match(
     ignore_unused: bool = False,
     **kwargs: Any,
 ) -> Match[bytes] | None: ...
+
+prefixmatch = match
+
 @overload
 def fullmatch(
     pattern: str | Pattern[str],
@@ -434,6 +438,7 @@ class Pattern(Generic[AnyStr]):
         partial: bool = False,
         timeout: float | None = None,
     ) -> Match[bytes] | None: ...
+    prefixmatch = match
     @overload
     def fullmatch(
         self: Pattern[str],