Update pre-commit config

Author: necaris

.pre-commit-config.yaml

@@ -1,5 +1,5 @@
 default_language_version:
-    python: python3.7
+    python: python3.8
 fail_fast: true
 repos:
   - repo: git://github.com/pre-commit/pre-commit-hooks
@@ -14,7 +14,7 @@ repos:
       exclude: README.md
     - id: flake8
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.720
+    rev: v0.782
     hooks:
       - id: mypy
         args: [--ignore-missing-imports, --no-strict-optional]

tox.ini

@@ -14,4 +14,3 @@ deps =
     pytest-cov
 commands =
     pytest tests/ --cov-report=term-missing --cov=graphene_pydantic {posargs}
-