Bump urllib3 from 1.22 to 1.26.19

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.22 to 1.26.19.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.26.19/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.22...1.26.19)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

Pipfile.lock

@@ -3,19 +3,6 @@
         "hash": {
             "sha256": "1e4f55ca8224cc9dd96a096a373c6f73c7f0eb1bddb24fd7faf22093ebe6231b"
         },
-        "host-environment-markers": {
-            "implementation_name": "cpython",
-            "implementation_version": "3.6.3",
-            "os_name": "posix",
-            "platform_machine": "x86_64",
-            "platform_python_implementation": "CPython",
-            "platform_release": "4.13.0-21-generic",
-            "platform_system": "Linux",
-            "platform_version": "#24-Ubuntu SMP Mon Dec 18 17:29:16 UTC 2017",
-            "python_full_version": "3.6.3",
-            "python_version": "3.6",
-            "sys_platform": "linux"
-        },
         "pipfile-spec": 6,
         "requires": {},
         "sources": [
@@ -148,10 +135,12 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b",
-                "sha256:cc44da8e1145637334317feebd728bd869a35285b93cbb4cca2577da7e62db4f"
+                "sha256:37a0344459b199fce0e80b0d3569837ec6b6937435c5244e7fd73fa6006830f3",
+                "sha256:3e3d753a8618b86d7de333b4223005f68720bcd6a7d2bcb9fbd2229ec7c1e429"
             ],
-            "version": "==1.22"
+            "index": "pypi",
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5'",
+            "version": "==1.26.19"
         }
     },
     "develop": {}