Update dependencies

pyproject.toml

@@ -25,17 +25,17 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry.dependencies]
 python = "^3.6.8"
-aiohttp = "^3.6.1"
-jsonschema = "^3.0.2"
+aiohttp = "^3.6.3"
+jsonschema = "^3.2.0"
 pypeg2 = "^2.15.2"
-attrs = "^19.3.0"
+attrs = "^20.2.0"
 base58 = "^2.0.0"
-libnacl = "^1.6.1"
+libnacl = "^1.7.1"
 pyaes = "^1.6.1"
 
 [tool.poetry.dev-dependencies]
 black = "^20.8b1"
-mypy = "^0.730"
-pylint = "^2.4.2"
-sphinx = "^3.0.2"
-sphinx_rtd_theme = "^0.4.3"
+mypy = "^0.790"
+pylint = "^2.6.0"
+sphinx = "^3.2.1"
+sphinx_rtd_theme = "^0.5.0"