Bump lodash from 4.17.4 to 4.17.15 in /pusher

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.4 to 4.17.15.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.4...4.17.15)

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

Author: dependabot[bot]

pusher/package-lock.json

@@ -134,10 +134,23 @@ cookie@0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
 
+cookie@0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.0.tgz#beb437e7022b3b6d49019d088665303ebe9c14ba"
+  integrity sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==
+
 core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
+cors@^2.8.5:
+  version "2.8.5"
+  resolved "https://registry.yarnpkg.com/cors/-/cors-2.8.5.tgz#eac11da51592dd86b9f06f6e7ac293b3df875d29"
+  integrity sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==
+  dependencies:
+    object-assign "^4"
+    vary "^1"
+
 cryptiles@2.x.x:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-2.0.5.tgz#3bdfecdc608147c1c67202fa291e7dca59eaa3b8"
@@ -212,18 +225,18 @@ etag@~1.7.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.7.0.tgz#03d30b5f67dd6e632d2945d30d6652731a34d5d8"
 
-express-session@^1.15.1:
-  version "1.16.2"
-  resolved "https://registry.yarnpkg.com/express-session/-/express-session-1.16.2.tgz#59f36d7770e94872d19b163b6708a2d16aa6848c"
-  integrity sha512-oy0sRsdw6n93E9wpCNWKRnSsxYnSDX9Dnr9mhZgqUEEorzcq5nshGYSZ4ZReHFhKQ80WI5iVUUSPW7u3GaKauw==
+express-session@^1.16.2:
+  version "1.17.0"
+  resolved "https://registry.yarnpkg.com/express-session/-/express-session-1.17.0.tgz#9b50dbb5e8a03c3537368138f072736150b7f9b3"
+  integrity sha512-t4oX2z7uoSqATbMfsxWMbNjAL0T5zpvcJCk3Z9wnPPN7ibddhnmDZXHfEcoBMG2ojKXZoCyPMc5FbtK+G7SoDg==
   dependencies:
-    cookie "0.3.1"
+    cookie "0.4.0"
     cookie-signature "1.0.6"
     debug "2.6.9"
     depd "~2.0.0"
     on-headers "~1.0.2"
     parseurl "~1.3.3"
-    safe-buffer "5.1.2"
+    safe-buffer "5.2.0"
     uid-safe "~2.1.5"
 
 express@^4.14.1:
@@ -431,8 +444,9 @@ jsprim@^1.2.2:
     verror "1.3.6"
 
 lodash@^4.14.0:
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
+  version "4.17.15"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
 
 media-typer@0.3.0:
   version "0.3.0"
@@ -485,6 +499,11 @@ oauth-sign@~0.8.1:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
+object-assign@^4:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+  integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
+
 on-finished@~2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.3.0.tgz#20f1336481b083cd75337992a16971aa2d906947"
@@ -613,10 +632,10 @@ request@2.74.0:
     tough-cookie "~2.3.0"
     tunnel-agent "~0.4.1"
 
-safe-buffer@5.1.2:
-  version "5.1.2"
-  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
-  integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
+safe-buffer@5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.0.tgz#b74daec49b1148f88c64b68d49b1e815c1f2f519"
+  integrity sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg==
 
 send@0.14.2:
   version "0.14.2"
@@ -738,6 +757,11 @@ utils-merge@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.0.tgz#0294fb922bb9375153541c4f7096231f287c8af8"
 
+vary@^1:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
+  integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=
+
 vary@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.0.tgz#e1e5affbbd16ae768dd2674394b9ad3022653140"