update mongodb to 3.1

Author: jakewmeyer

package.json

@@ -35,7 +35,7 @@
     "koa-router": "^7.4.0",
     "koa2-cors": "^2.0.5",
     "lower-case": "^1.1.4",
-    "mongodb": "^3.0.10",
+    "mongodb": "^3.1.0",
     "path": "^0.12.7"
   },
   "devDependencies": {

yarn.lock

@@ -2689,18 +2689,20 @@ mkdirp@^0.5.0, mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mongodb-core@3.0.9:
-  version "3.0.9"
-  resolved "https://registry.yarnpkg.com/mongodb-core/-/mongodb-core-3.0.9.tgz#8327410c88811013fb3e4ac7c4c670f324349be1"
+mongodb-core@3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/mongodb-core/-/mongodb-core-3.1.0.tgz#af91f36fd560ed785f4e61e694432df4d3698aad"
   dependencies:
     bson "~1.0.4"
     require_optional "^1.0.1"
+  optionalDependencies:
+    saslprep "^1.0.0"
 
-mongodb@^3.0.10:
-  version "3.0.10"
-  resolved "https://registry.yarnpkg.com/mongodb/-/mongodb-3.0.10.tgz#f948cb9595adcbfcad7444f6b24a040b653b23e8"
+mongodb@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/mongodb/-/mongodb-3.1.0.tgz#20cd836381a4d8a6b1c5a194bb9c8dde852163bb"
   dependencies:
-    mongodb-core "3.0.9"
+    mongodb-core "3.1.0"
 
 [email protected]:
   version "2.0.0"
@@ -3449,6 +3451,10 @@ sane@^2.0.0:
   optionalDependencies:
     fsevents "^1.2.3"
 
+saslprep@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/saslprep/-/saslprep-1.0.0.tgz#2c4968a0bfbf249530cd597bc62870ccd4b41a24"
+
 sax@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"