Bump click from 6.6 to 7.0

Bumps [click](https://github.com/pallets/click) from 6.6 to 7.0.
- [Release notes](https://github.com/pallets/click/releases)
- [Changelog](https://github.com/pallets/click/blob/master/CHANGES.rst)
- [Commits](pallets/click@6.6...7.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

requirements.in

@@ -1,5 +1,5 @@
 asn1==2.2.0
-click==6.6
+click==7.0
 cryptography>=2.7.0
 cffi>=1.13.0
 future==0.15.2

requirements.txt

@@ -4,28 +4,28 @@
 #
 #    pip-compile --output-file=requirements.txt requirements.in
 #
-asn1==2.2.0
+asn1==2.2.0               # via -r requirements.in
 asn1crypto==0.24.0        # via cryptography
 certifi==2018.11.29       # via requests
-cffi==1.13.0
+cffi==1.13.0              # via -r requirements.in, cryptography
 chardet==3.0.4            # via requests
-click==6.6
-cryptography==2.7
-deprecated==1.2.6
-future==0.15.2
+click==7.0                # via -r requirements.in
+cryptography==2.7         # via -r requirements.in, pyopenssl
+deprecated==1.2.6         # via -r requirements.in
+future==0.15.2            # via -r requirements.in
 idna==2.7                 # via requests
-itsdangerous==0.24
-pbr==1.10.0
-protobuf==3.7.0
+itsdangerous==0.24        # via -r requirements.in
+pbr==1.10.0               # via -r requirements.in
+protobuf==3.7.0           # via -r requirements.in
 pycparser==2.18           # via cffi
-pyopenssl==18.0.0
-pytz==2018.9
-pyyaml==5.2
-requests==2.21.0
+pyopenssl==18.0.0         # via -r requirements.in
+pytz==2018.9              # via -r requirements.in
+pyyaml==5.2               # via -r requirements.in
+requests==2.21.0          # via -r requirements.in
 six==1.10.0               # via cryptography, protobuf, pyopenssl
-urllib3==1.24.2
-wheel==0.24.0
+urllib3==1.24.2           # via -r requirements.in, requests
+wheel==0.24.0             # via -r requirements.in
 wrapt==1.11.2             # via deprecated
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==43.0.0        # via protobuf
+# setuptools