chore(deps): update dependency nock to v9.0.19

package.json

@@ -43,6 +43,6 @@
     "hubot-test-helper": "1.7.0",
     "istanbul": "0.4.5",
     "mocha": "3.5.3",
-    "nock": "9.0.18"
+    "nock": "9.0.19"
   }
 }

yarn.lock

@@ -423,12 +423,18 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
-debug@2.6.8, debug@^2.2.0:
+debug@2.6.8:
   version "2.6.8"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.8.tgz#e731531ca2ede27d188222427da17821d68ff4fc"
   dependencies:
     ms "2.0.0"
 
+debug@^2.2.0:
+  version "2.6.9"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
+  dependencies:
+    ms "2.0.0"
+
 debug@~2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
@@ -1114,9 +1120,9 @@ negotiator@0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
 
-nock@9.0.18:
-  version "9.0.18"
-  resolved "https://registry.yarnpkg.com/nock/-/nock-9.0.18.tgz#814b6af376b8399d1bbcbaa17f1a458c653a719b"
+nock@9.0.19:
+  version "9.0.19"
+  resolved "https://registry.yarnpkg.com/nock/-/nock-9.0.19.tgz#6c2349701f130a80cc5ef0e7aedf85798e776e56"
   dependencies:
     chai ">=1.9.2 <4.0.0"
     debug "^2.2.0"
@@ -1486,8 +1492,8 @@ supports-color@^3.1.0:
     has-flag "^1.0.0"
 
 tough-cookie@~2.3.0:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.2.tgz#f081f76e4c85720e6c37a5faced737150d84072a"
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.3.tgz#0b618a5565b6dea90bf3425d04d55edc475a7561"
   dependencies:
     punycode "^1.4.1"