Update vendor file

Signed-off-by: Dan Ryan <dan@danryan.co>

pipenv/vendor/vendor.txt

@@ -3,10 +3,10 @@ backports.shutil_get_terminal_size==1.0.0
 backports.weakref==1.0.post1
 blindspin==2.0.1
 click==7.0
-click-completion==0.4.1
+click-completion==0.5.0
 click-didyoumean==0.0.3
 colorama==0.3.9
-delegator.py==0.1.1
+delegator.py==0.1.2
     pexpect==4.6.0
         ptyprocess==0.6.0
 python-dotenv==0.9.1
@@ -21,18 +21,17 @@ pipdeptree==0.13.0
 pipreqs==0.4.9
     docopt==0.6.2
     yarg==0.1.9
-pythonfinder==1.1.8
-requests==2.20.0
+pythonfinder==1.1.9
+requests==2.20.1
     chardet==3.0.4
     idna==2.7
     urllib3==1.24
     certifi==2018.10.15
-requirementslib==1.3.0
+requirementslib==1.3.1
     attrs==18.2.0
     distlib==0.2.8
-    packaging==18.0
+    packaging==18.1
     pyparsing==2.2.2
-    pytoml==0.1.19
     plette==0.2.2
         tomlkit==0.5.2
 shellingham==1.2.7
@@ -41,7 +40,7 @@ semver==2.8.1
 shutilwhich==1.1.0
 toml==0.10.0
 cached-property==1.4.3
-vistir==0.2.2
+vistir==0.2.4
 pip-shims==0.3.2
 ptyprocess==0.6.0
 enum34==1.1.6