Fix mypy issues

Now I can reproduce them.

Author: pgjones

src/sql_tstring/__init__.py

@@ -25,7 +25,7 @@
 from sql_tstring.t import t, Template as TTemplate
 
 try:
-    from string.templatelib import Template  # type: ignore[import-untyped]
+    from string.templatelib import Template
 except ImportError:
 
     class Template:  # type: ignore[no-redef]
@@ -87,7 +87,7 @@ def sql_context(
 def sql(
     query_or_template: str | Template | TTemplate, values: dict[str, typing.Any] | None = None
 ) -> tuple[str, list]:
-    template: Template
+    template: Template | TTemplate
     if isinstance(query_or_template, (Template, TTemplate)) and values is None:
         template = query_or_template
     elif isinstance(query_or_template, str) and values is not None:

src/sql_tstring/parser.py

@@ -8,7 +8,7 @@
 from sql_tstring.t import Interpolation as TInterpolation, Template as TTemplate
 
 try:
-    from string.templatelib import Interpolation, Template  # type: ignore[import-untyped]
+    from string.templatelib import Interpolation, Template
 except ImportError:
 
     class Interpolation:  # type: ignore[no-redef]
@@ -355,17 +355,17 @@ class Operator:
 type Element = Node | Operator | Part | Placeholder
 
 
-def parse(template: Template) -> list[Statement]:
+def parse(template: Template | TTemplate) -> list[Statement]:
     statements = [Statement()]
     current_node: Node = statements[0]
     _parse_template(template, current_node, statements)
     return statements
 
 
-def _parse_template(template: Template, current_node: Node, statements: list[Statement]) -> None:
+def _parse_template(template: Template | TTemplate, current_node: Node, statements: list[Statement]) -> None:
     for item in template:
         match item:
-            case Interpolation(value, _, _, _):  # type: ignore[misc]
+            case Interpolation(value, _, _, _):
                 if isinstance(value, (Template, TTemplate)):
                     _parse_template(value, current_node, statements)
                 else: