updated package setup (#485)

* updated package setup

* updated to use python 3.9

* fixed test runner

* fixed typecheck tests

* fixed discrepencies

* added override to runner

* updated travis

* updated pre-commit hooks

* updated dep

.pre-commit-config.yaml

@@ -0,0 +1,39 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+default_language_version:
+  python: python3.9
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.3.0
+    hooks:
+      - id: check-yaml
+      - id: trailing-whitespace
+      - id: check-executables-have-shebangs
+      - id: debug-statements
+      - id: check-merge-conflict
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v2.7.3
+    hooks:
+      - id: pyupgrade
+        args: ["--py36-plus"]
+  - repo: https://github.com/pre-commit/mirrors-isort
+    rev: v5.6.4
+    hooks:
+      - id: isort
+  - repo: https://github.com/psf/black
+    rev: 20.8b1
+    hooks:
+      - id: black
+  - repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.4
+    hooks:
+      - id: flake8
+  - repo: local
+    hooks:
+      - id: mypy
+        name: mypy
+        entry: mypy
+        language: system
+        types: [ python ]
+        exclude: "scripts/*"
+        args: [ "--cache-dir=/dev/null", "--no-incremental" ]