Use tox to ensure support for python 3.7 & 3.8

.coveragerc

@@ -1,7 +1,18 @@
 [run]
+parallel = true
+source =
+    pyramid_openapi3
 branch = True
 
+[paths]
+source =
+    pyramid_openapi3
+    */site-packages/pyramid_openapi3
+
 [report]
+show_missing = true
+precision = 2
+
 # Regexes for lines to exclude from consideration
 exclude_lines =
     # Have to re-enable the standard pragma

Pipfile

@@ -10,7 +10,6 @@ pyramid-openapi3 = {editable = true,path = "."}
 black = "==19.3b0"
 codespell = "*"
 docutils = "==0.15"
-dataclasses = {version = "*",markers = "python_version < '3.7'"}
 flake8 = "*"
 flake8-assertive = "*"
 flake8-blind-except = "*"
@@ -29,15 +28,12 @@ flake8-print = "*"
 flake8-self = "*"
 flake8-super-call = "*"
 flake8-tuple = "*"
-importlib-resources = {version = "*",markers = "python_version < '3.7'"}
 lxml = "*"
 mypy = "*"
 pre-commit = "*"
 pre-commit-hooks = "*"
 pydocstyle = "<4.0.0"
-pytest = "*"
-pytest-cov = "*"
+pyramid-openapi3 = {editable = true, path = ".", extras = ["testing"]}
 pytest-randomly = "*"
 twine = "*"
 webtest = "*"
-typecov = "*"