Bump mongodb from 3.5.5 to 3.5.6

Bumps [mongodb](https://github.com/mongodb/node-mongodb-native) from 3.5.5 to 3.5.6.
- [Release notes](https://github.com/mongodb/node-mongodb-native/releases)
- [Changelog](https://github.com/mongodb/node-mongodb-native/blob/master/CHANGES_3.0.0.md)
- [Commits](https://github.com/mongodb/node-mongodb-native/compare/v3.5.5...v3.5.6)

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

package-lock.json

@@ -1064,9 +1064,9 @@
       }
     },
     "bson": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.3.tgz",
-      "integrity": "sha512-TdiJxMVnodVS7r0BdL42y/pqC9cL2iKynVwA0Ho3qbsQYr428veL3l7BQyuqiw+Q5SqqoT0m4srSY/BlZ9AxXg=="
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.4.tgz",
+      "integrity": "sha512-S/yKGU1syOMzO86+dGpg2qGoDL0zvzcb262G+gqEy6TgP6rt6z6qxSFX/8X6vLC91P7G7C3nLs0+bvDzmvBA3Q=="
     },
     "buffer-equal": {
       "version": "1.0.0",
@@ -4943,12 +4943,12 @@
       }
     },
     "mongodb": {
-      "version": "3.5.5",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.5.5.tgz",
-      "integrity": "sha512-GCjDxR3UOltDq00Zcpzql6dQo1sVry60OXJY3TDmFc2SWFY6c8Gn1Ardidc5jDirvJrx2GC3knGOImKphbSL3A==",
+      "version": "3.5.6",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.5.6.tgz",
+      "integrity": "sha512-sh3q3GLDLT4QmoDLamxtAECwC3RGjq+oNuK1ENV8+tnipIavss6sMYt77hpygqlMOCt0Sla5cl7H4SKCVBCGEg==",
       "requires": {
         "bl": "^2.2.0",
-        "bson": "^1.1.1",
+        "bson": "^1.1.4",
         "denque": "^1.4.1",
         "require_optional": "^1.0.1",
         "safe-buffer": "^5.1.2",