[Security] Bump urllib3 from 1.24.1 to 1.24.2

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.24.1 to 1.24.2. **This update includes security fixes.**
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/master/CHANGES.rst)
- [Commits](urllib3/urllib3@1.24.1...1.24.2)

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

Author: dependabot-support

requirements.txt

@@ -8,10 +8,10 @@ certifi==2018.11.29       # via requests
 chardet==3.0.4            # via requests
 django-amber==0.8.0
 django-appconf==1.0.2     # via django-compressor
+django-compressor==2.2
 django-dotenv==1.4.2
 django-markdown-deux==1.0.5
 django==1.10.4
-django_compressor==2.2
 http-crawler==0.1.2       # via django-amber
 idna==2.8                 # via requests
 lxml==3.7.1               # via http-crawler
@@ -21,5 +21,5 @@ rcssmin==1.0.6            # via django-compressor
 requests==2.21.0
 rjsmin==1.0.12            # via django-compressor
 tinycss2==0.5             # via http-crawler
-urllib3==1.24.1           # via requests
+urllib3==1.24.2           # via requests
 webencodings==0.5         # via tinycss2