fix(npm): Update and save mockery as dep, not devDep

Mockery should be installed when this module is required as a dependency of others.

package.json

@@ -33,6 +33,7 @@
     "connect-multiparty": "^1.2.5",
     "dotenv": "^4.0.0",
     "express": "^3.21.2",
+    "mockery": "^2.1.0",
     "nubot-playbook": "^1.0.0",
     "scoped-http-client": "0.11.0",
     "winston": "3.0.0-rc0",
@@ -45,7 +46,6 @@
     "cz-conventional-changelog": "^2.1.0",
     "hubot-pretend": "^1.2.0",
     "mocha": "^2.1.0",
-    "mockery": "^1.4.0",
     "nubot-connect-mongo": "^0.1.0",
     "nyc": "^11.2.1",
     "semantic-release": "^8.0.3",

yarn.lock

@@ -912,6 +912,16 @@ cz-conventional-changelog@1.2.0:
     right-pad "^1.0.1"
     word-wrap "^1.0.3"
 
+cz-conventional-changelog@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/cz-conventional-changelog/-/cz-conventional-changelog-2.1.0.tgz#2f4bc7390e3244e4df293e6ba351e4c740a7c764"
+  dependencies:
+    conventional-commit-types "^2.0.0"
+    lodash.map "^4.5.1"
+    longest "^1.0.1"
+    right-pad "^1.0.1"
+    word-wrap "^1.0.3"
+
 d@1:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/d/-/d-1.0.0.tgz#754bb5bfe55451da69a58b94d45f4c5b0462d58f"
@@ -2816,10 +2826,6 @@ mocha@^2.1.0:
     supports-color "1.2.0"
     to-iso-string "0.0.2"
 
-mockery@^1.4.0:
-  version "1.7.0"
-  resolved "https://registry.yarnpkg.com/mockery/-/mockery-1.7.0.tgz#f4ede0d8750c1c9727c272ea2c60629e2c9a1c4f"
-
 mockery@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/mockery/-/mockery-2.1.0.tgz#5b0aef1ff564f0f8139445e165536c7909713470"