Do not install mypy and black with py35

Author: Natim

dev-requirements.txt

@@ -2,9 +2,3 @@ black
 flake8
 isort
 mypy
-pytest<5.4
-pytest-cache
-pytest-cov
-pytest-sugar
-pytest-xdist
-tox

test-requirements.txt

@@ -0,0 +1,6 @@
+pytest<5.4
+pytest-cache
+pytest-cov
+pytest-sugar
+pytest-xdist
+tox

tox.ini

@@ -5,9 +5,16 @@ envlist = py35,py36,py37,py38,flake8
 commands =
     mypy --ignore-missing-imports --scripts-are-modules alma
     pytest tests --cov-report term-missing --cov alma {posargs} # --cov-fail-under 100
-deps = -rdev-requirements.txt
+deps =
+    -rtest-requirements.txt
+	-rdev-requirements.txt
 install_command = pip install {opts} {packages}
 
+[testenv:py35]
+commands =
+    pytest tests --cov-report term-missing --cov alma {posargs} # --cov-fail-under 100
+deps = -rtest-requirements.txt
+
 [testenv:flake8]
 commands = flake8 alma
 deps =