Upgrade requests to 2.21.0

.gitignore

@@ -59,3 +59,4 @@ docs/_build/
 # PyBuilder
 target/
 
+/.python-version

CONTRIBUTING.rst

@@ -30,13 +30,13 @@ Or, if ``virtualenv`` is not installed on your system:
 
 4. Commit your changes (``$ git commit -am 'Added <xyz> feature'``)
 
-5. Run tests
+5. Run tests and validate that the code conforms to `PEP8 <https://www.python.org/dev/peps/pep-0008/>`__
 
 .. code:: bash
 
-    (develop) $ ./tests.py -v
+    (develop) $ pytest --pep8
 
-Conform to `PEP8 <https://www.python.org/dev/peps/pep-0008/>`__ and if everything is running fine, integrate your feature
+If everything is running fine, integrate your feature
 
 6. Push to the branch (``$ git push origin my-new-awesome-feature``)
 
@@ -53,44 +53,57 @@ To do
 Tests
 ~~~~~
 
-``Vocabulary`` uses ``unittesting`` for testing purposes.
+``Vocabulary`` uses ``pytest`` for testing purposes.
 
 Running the test cases
 
 .. code:: bash
 
-    test_antonym_ant_key_error (tests.tests.TestModule) ... ok
-    test_antonym_found (tests.tests.TestModule) ... ok
-    test_antonym_not_found (tests.tests.TestModule) ... ok
-    test_hyphenation_found (tests.tests.TestModule) ... ok
-    test_hyphenation_not_found (tests.tests.TestModule) ... ok
-    test_meaning_found (tests.tests.TestModule) ... ok
-    test_meaning_key_error (tests.tests.TestModule) ... ok
-    test_meaning_not_found (tests.tests.TestModule) ... ok
-    test_partOfSpeech_found (tests.tests.TestModule) ... ok
-    test_partOfSpeech_not_found (tests.tests.TestModule) ... ok
-    test_pronunciation_found (tests.tests.TestModule) ... ok
-    test_pronunciation_not_found (tests.tests.TestModule) ... ok
-    test_respond_as_dict_1 (tests.tests.TestModule) ... ok
-    test_respond_as_dict_2 (tests.tests.TestModule) ... ok
-    test_respond_as_dict_3 (tests.tests.TestModule) ... ok
-    test_respond_as_list_1 (tests.tests.TestModule) ... ok
-    test_respond_as_list_2 (tests.tests.TestModule) ... ok
-    test_respond_as_list_3 (tests.tests.TestModule) ... ok
-    test_synonynm_empty_list (tests.tests.TestModule) ... ok
-    test_synonynm_found (tests.tests.TestModule) ... ok
-    test_synonynm_not_found (tests.tests.TestModule) ... ok
-    test_synonynm_tuc_key_error (tests.tests.TestModule) ... ok
-    test_translate_empty_list (tests.tests.TestModule) ... ok
-    test_translate_found (tests.tests.TestModule) ... ok
-    test_translate_not_found (tests.tests.TestModule) ... ok
-    test_translate_tuc_key_error (tests.tests.TestModule) ... ok
-    test_usageExample_empty_list (tests.tests.TestModule) ... ok
-    test_usageExample_found (tests.tests.TestModule) ... ok
-    test_usageExample_not_found (tests.tests.TestModule) ... ok
-
-    ----------------------------------------------------------------------
-    Ran 29 tests in 0.015s
-
-    OK
+    $ pytest --pep8
+    ========================== test session starts ==========================
+    platform darwin -- Python 3.7.2, pytest-4.3.1, py-1.8.0, pluggy-0.9.0
+    cachedir: .pytest_cache
+    rootdir: /Users/mike/dev/vocabulary, inifile: pytest.ini
+    plugins: pep8-1.0.6, mock-1.10.1
+    collected 37 items
+
+    setup.py PASSED                                                   [  2%]
+    docs/conf.py PASSED                                               [  5%]
+    tests/__init__.py PASSED                                          [  8%]
+    tests/tests.py PASSED                                             [ 10%]
+    tests/tests.py::TestModule::test_antonym_ant_key_error PASSED     [ 13%]
+    tests/tests.py::TestModule::test_antonym_found PASSED             [ 16%]
+    tests/tests.py::TestModule::test_antonym_not_found PASSED         [ 18%]
+    tests/tests.py::TestModule::test_hyphenation_found PASSED         [ 21%]
+    tests/tests.py::TestModule::test_hyphenation_not_found PASSED     [ 24%]
+    tests/tests.py::TestModule::test_meaning_found PASSED             [ 27%]
+    tests/tests.py::TestModule::test_meaning_key_error PASSED         [ 29%]
+    tests/tests.py::TestModule::test_meaning_not_found PASSED         [ 32%]
+    tests/tests.py::TestModule::test_partOfSpeech_found PASSED        [ 35%]
+    tests/tests.py::TestModule::test_partOfSpeech_not_found PASSED    [ 37%]
+    tests/tests.py::TestModule::test_pronunciation_found PASSED       [ 40%]
+    tests/tests.py::TestModule::test_pronunciation_not_found PASSED   [ 43%]
+    tests/tests.py::TestModule::test_respond_as_dict_1 PASSED         [ 45%]
+    tests/tests.py::TestModule::test_respond_as_dict_2 PASSED         [ 48%]
+    tests/tests.py::TestModule::test_respond_as_dict_3 PASSED         [ 51%]
+    tests/tests.py::TestModule::test_respond_as_list_1 PASSED         [ 54%]
+    tests/tests.py::TestModule::test_respond_as_list_2 PASSED         [ 56%]
+    tests/tests.py::TestModule::test_respond_as_list_3 PASSED         [ 59%]
+    tests/tests.py::TestModule::test_synonynm_empty_list PASSED       [ 62%]
+    tests/tests.py::TestModule::test_synonynm_found PASSED            [ 64%]
+    tests/tests.py::TestModule::test_synonynm_not_found PASSED        [ 67%]
+    tests/tests.py::TestModule::test_synonynm_tuc_key_error PASSED    [ 70%]
+    tests/tests.py::TestModule::test_translate_empty_list PASSED      [ 72%]
+    tests/tests.py::TestModule::test_translate_found PASSED           [ 75%]
+    tests/tests.py::TestModule::test_translate_not_found PASSED       [ 78%]
+    tests/tests.py::TestModule::test_translate_tuc_key_error PASSED   [ 81%]
+    tests/tests.py::TestModule::test_usageExample_empty_list PASSED   [ 83%]
+    tests/tests.py::TestModule::test_usageExample_found PASSED        [ 86%]
+    tests/tests.py::TestModule::test_usageExample_not_found PASSED    [ 89%]
+    vocabulary/__init__.py PASSED                                     [ 91%]
+    vocabulary/responselib.py PASSED                                  [ 94%]
+    vocabulary/version.py PASSED                                      [ 97%]
+    vocabulary/vocabulary.py PASSED                                   [100%]
+
+    ======================= 37 passed in 0.25 seconds =======================