Update ghost-ignition to version 2.8.8 🚀 (#8089)

* chore(package): update ghost-ignition to version 2.8.8

https://greenkeeper.io/

* chore: yarn.lock

package.json

@@ -49,7 +49,7 @@
     "fs-extra": "2.0.0",
     "ghost-editor": "0.1.10",
     "ghost-gql": "0.0.6",
-    "ghost-ignition": "2.8.7",
+    "ghost-ignition": "2.8.8",
     "glob": "5.0.15",
     "gscan": "0.2.1",
     "html-to-text": "3.1.0",

yarn.lock

@@ -2079,7 +2079,23 @@ ghost-gql@0.0.6:
   dependencies:
     lodash "^4.17.4"
 
-ghost-ignition@2.8.7, ghost-ignition@^2.8.2, ghost-ignition@^2.8.7:
+ghost-ignition@2.8.8:
+  version "2.8.8"
+  resolved "https://registry.yarnpkg.com/ghost-ignition/-/ghost-ignition-2.8.8.tgz#84b783de984a60a38d57bae9210e3a29c92a5450"
+  dependencies:
+    bunyan "1.8.5"
+    bunyan-loggly "1.1.0"
+    caller "1.0.1"
+    debug "2.2.0"
+    find-root "1.0.0"
+    json-stringify-safe "5.0.1"
+    lodash "4.16.4"
+    moment "2.15.2"
+    nconf "0.8.4"
+    node-uuid "1.4.7"
+    prettyjson "1.1.3"
+
+ghost-ignition@^2.8.2, ghost-ignition@^2.8.7:
   version "2.8.7"
   resolved "https://registry.yarnpkg.com/ghost-ignition/-/ghost-ignition-2.8.7.tgz#5339bb01dfe3938f4420e69300b17c8397080a0c"
   dependencies: