Refactor typings

* Improve typing of `__init__()`
* Update typing of `Map`-producing functions to produce the correct type
* Update typing of other methods to more closely align with `Mapping`
* Add protocol classes for unexposed data structures
* Export protocol classes for ease of use in typed code
* Update stub file to pass in mypy strict mode

1 files changed, 9 insertions, 0 deletions

diff --git a/mypy.ini b/mypy.ini
new file mode 100644
index 0000000..6b604b8
--- /dev/null
+++ b/mypy.ini
@@ -0,0 +1,9 @@
+[mypy]
+incremental = True
+strict = True
+
+[mypy-immutables.map]
+ignore_errors = True
+
+[mypy-immutables._testutils]
+ignore_errors = True