Bump wheel from 0.30.0 to 0.38.1 in /requirements

requirements/testing.txt

@@ -4,28 +4,77 @@
 #
 #    pip-compile --output-file requirements/testing.txt requirements/testing.in
 #
-aspy.yaml==0.3.0          # via pre-commit
-attrs==17.2.0             # via hypothesis
-cached-property==1.3.1    # via pre-commit
+aspy-yaml==0.3.0
+    # via pre-commit
+attrs==17.2.0
+    # via hypothesis
+cached-property==1.3.1
+    # via pre-commit
 certifi==2017.7.27.1
+    # via
+    #   -r requirements.txt
+    #   requests
 chardet==3.0.4
+    # via
+    #   -r requirements.txt
+    #   requests
 codecov==2.0.9
-cookies==2.2.1            # via responses
+    # via -r testing.in
+cookies==2.2.1
+    # via responses
 coverage==4.4.1
+    # via
+    #   -r testing.in
+    #   codecov
+    #   hypothesis
+    #   pytest-cov
 freezegun==0.3.10
+    # via -r testing.in
 hypothesis==3.31.2
+    # via -r testing.in
 idna==2.6
-nodeenv==1.2.0            # via pre-commit
+    # via
+    #   -r requirements.txt
+    #   requests
+nodeenv==1.2.0
+    # via pre-commit
 pre-commit==0.13.6
-py==1.4.34                # via pytest
+    # via -r testing.in
+py==1.4.34
+    # via pytest
 pycodestyle==2.3.1
-pytest-cov==2.5.1
+    # via -r testing.in
 pytest==3.2.2
+    # via
+    #   -r testing.in
+    #   pytest-cov
+pytest-cov==2.5.1
+    # via -r testing.in
 python-dateutil==2.6.1
-pyyaml==3.12              # via aspy.yaml, pre-commit
+    # via
+    #   -r requirements.txt
+    #   freezegun
+pyyaml==3.12
+    # via pre-commit
 requests==2.18.4
+    # via
+    #   -r requirements.txt
+    #   codecov
+    #   responses
 responses==0.8.0
+    # via -r testing.in
 six==1.11.0
+    # via
+    #   -r requirements.txt
+    #   freezegun
+    #   pre-commit
+    #   python-dateutil
+    #   responses
 urllib3==1.22
-virtualenv==15.1.0        # via pre-commit
-wheel==0.30.0
+    # via
+    #   -r requirements.txt
+    #   requests
+virtualenv==15.1.0
+    # via pre-commit
+wheel==0.38.1
+    # via -r testing.in