diff --git a/package-lock.json b/package-lock.json
index 25c4eea..41ab613 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1984,7 +1984,6 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
       "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
-      "optional": true,
       "requires": {
         "tweetnacl": "^0.14.3"
       }
@@ -4238,7 +4237,6 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
       "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
-      "optional": true,
       "requires": {
         "jsbn": "~0.1.0"
       }
@@ -6552,8 +6550,7 @@
         },
         "asn1": {
           "version": "0.2.3",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "assert-plus": {
           "version": "0.2.0",
@@ -6577,12 +6574,12 @@
         },
         "balanced-match": {
           "version": "0.4.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "bcrypt-pbkdf": {
           "version": "1.0.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "tweetnacl": "^0.14.3"
           }
@@ -6606,6 +6603,7 @@
         "brace-expansion": {
           "version": "1.1.7",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^0.4.1",
             "concat-map": "0.0.1"
@@ -6641,7 +6639,8 @@
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
@@ -6664,7 +6663,6 @@
         "dashdash": {
           "version": "1.14.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "assert-plus": "^1.0.0"
           },
@@ -6707,7 +6705,6 @@
         "ecc-jsbn": {
           "version": "0.1.1",
           "bundled": true,
-          "optional": true,
           "requires": {
             "jsbn": "~0.1.0"
           }
@@ -6739,7 +6736,8 @@
         },
         "fs.realpath": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "fstream": {
           "version": "1.0.11",
@@ -6780,7 +6778,6 @@
         "getpass": {
           "version": "0.1.7",
           "bundled": true,
-          "optional": true,
           "requires": {
             "assert-plus": "^1.0.0"
           },
@@ -6795,6 +6792,7 @@
         "glob": {
           "version": "7.1.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "^1.0.0",
             "inflight": "^1.0.4",
@@ -6841,7 +6839,8 @@
         },
         "hoek": {
           "version": "2.16.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "http-signature": {
           "version": "1.1.1",
@@ -6856,6 +6855,7 @@
         "inflight": {
           "version": "1.0.6",
           "bundled": true,
+          "optional": true,
           "requires": {
             "once": "^1.3.0",
             "wrappy": "1"
@@ -6863,7 +6863,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.4",
@@ -6896,7 +6897,6 @@
         "jodid25519": {
           "version": "1.0.2",
           "bundled": true,
-          "optional": true,
           "requires": {
             "jsbn": "~0.1.0"
           }
@@ -6963,6 +6963,7 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -7041,6 +7042,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -7066,7 +7068,8 @@
         },
         "path-is-absolute": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "performance-now": {
           "version": "0.2.0",
@@ -7151,6 +7154,7 @@
         "rimraf": {
           "version": "2.6.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "glob": "^7.0.5"
           }
@@ -7183,29 +7187,6 @@
             "hoek": "2.x.x"
           }
         },
-        "sshpk": {
-          "version": "1.13.0",
-          "bundled": true,
-          "optional": true,
-          "requires": {
-            "asn1": "~0.2.3",
-            "assert-plus": "^1.0.0",
-            "bcrypt-pbkdf": "^1.0.0",
-            "dashdash": "^1.12.0",
-            "ecc-jsbn": "~0.1.1",
-            "getpass": "^0.1.1",
-            "jodid25519": "^1.0.0",
-            "jsbn": "~0.1.0",
-            "tweetnacl": "~0.14.0"
-          },
-          "dependencies": {
-            "assert-plus": {
-              "version": "1.0.0",
-              "bundled": true,
-              "optional": true
-            }
-          }
-        },
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
@@ -9978,8 +9959,7 @@
     "jsbn": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
-      "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM=",
-      "optional": true
+      "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM="
     },
     "jsesc": {
       "version": "1.3.0",
@@ -16124,9 +16104,9 @@
       }
     },
     "sshpk": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.13.1.tgz",
-      "integrity": "sha1-US322mKHFEMW3EwY/hzx2UBzm+M=",
+      "version": "1.15.2",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.15.2.tgz",
+      "integrity": "sha512-Ra/OXQtuh0/enyl4ETZAfTaeksa6BXks5ZcjpSUNrjBr0DvrJKX+1fsKDPpT9TBXgHAFsa4510aNVgI8g/+SzA==",
       "requires": {
         "asn1": "~0.2.3",
         "assert-plus": "^1.0.0",
@@ -16135,6 +16115,7 @@
         "ecc-jsbn": "~0.1.1",
         "getpass": "^0.1.1",
         "jsbn": "~0.1.0",
+        "safer-buffer": "^2.0.2",
         "tweetnacl": "~0.14.0"
       }
     },
@@ -17146,8 +17127,7 @@
     "tweetnacl": {
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "optional": true
+      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q="
     },
     "type-check": {
       "version": "0.3.2",