diff --git a/package-lock.json b/package-lock.json
index a3ca7f2..9ff0ca8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1632,7 +1632,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1653,12 +1654,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1666,24 +1669,25 @@
         },
         "chownr": {
           "version": "1.1.1",
-          "bundled": true,
-          "dev": true,
-          "optional": true
+          "bundled": true
         },
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1721,8 +1725,6 @@
         "fs-minipass": {
           "version": "1.2.5",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "minipass": "^2.2.1"
           }
@@ -1800,7 +1802,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1812,6 +1815,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1826,6 +1830,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -1833,12 +1838,12 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
-          "dev": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -1847,8 +1852,6 @@
         "minizlib": {
           "version": "1.2.1",
           "bundled": true,
-          "dev": true,
-          "optional": true,
           "requires": {
             "minipass": "^2.2.1"
           }
@@ -1857,6 +1860,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -1937,7 +1941,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -1949,6 +1954,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -2033,8 +2039,7 @@
         },
         "safe-buffer": {
           "version": "5.1.2",
-          "bundled": true,
-          "dev": true
+          "bundled": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -2070,6 +2075,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -2089,6 +2095,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -2099,21 +2106,6 @@
           "dev": true,
           "optional": true
         },
-        "tar": {
-          "version": "4.4.8",
-          "bundled": true,
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "chownr": "^1.1.1",
-            "fs-minipass": "^1.2.5",
-            "minipass": "^2.3.4",
-            "minizlib": "^1.1.1",
-            "mkdirp": "^0.5.0",
-            "safe-buffer": "^5.1.2",
-            "yallist": "^3.0.2"
-          }
-        },
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
@@ -2132,12 +2124,12 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
-          "bundled": true,
-          "dev": true
+          "bundled": true
         }
       }
     },
@@ -4205,23 +4197,32 @@
       }
     },
     "tar": {
-      "version": "4.4.10",
-      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.10.tgz",
-      "integrity": "sha512-g2SVs5QIxvo6OLp0GudTqEf05maawKUxXru104iaayWA09551tFCTI8f1Asb4lPfkBr91k07iL4c11XO3/b0tA==",
+      "version": "4.4.15",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.15.tgz",
+      "integrity": "sha512-ItbufpujXkry7bHH9NpQyTXPbJ72iTlXgkBAYsAjDXk3Ds8t/3NfO5P4xZGy7u+sYuQUbimgzswX4uQIEeNVOA==",
       "requires": {
         "chownr": "^1.1.1",
         "fs-minipass": "^1.2.5",
-        "minipass": "^2.3.5",
+        "minipass": "^2.8.6",
         "minizlib": "^1.2.1",
         "mkdirp": "^0.5.0",
         "safe-buffer": "^5.1.2",
         "yallist": "^3.0.3"
       },
       "dependencies": {
+        "minipass": {
+          "version": "2.9.0",
+          "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.9.0.tgz",
+          "integrity": "sha512-wxfUjg9WebH+CUDX/CdbRlh5SmfZiy/hpkxaRI16Y9W56Pa75sWgd/rvFilSgrauD9NyFymP/+JFV3KwzIsJeg==",
+          "requires": {
+            "safe-buffer": "^5.1.2",
+            "yallist": "^3.0.0"
+          }
+        },
         "yallist": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
+          "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
         }
       }
     },
@@ -4848,6 +4849,18 @@
         "underscore": "1.9.1",
         "web3-core-helpers": "1.2.0",
         "websocket": "github:frozeman/WebSocket-Node#6c72925e3f8aaaea8dc8450f97627e85263999f2"
+      },
+      "dependencies": {
+        "websocket": {
+          "version": "github:frozeman/WebSocket-Node#6c72925e3f8aaaea8dc8450f97627e85263999f2",
+          "from": "github:frozeman/WebSocket-Node#browserifyCompatible",
+          "requires": {
+            "debug": "^2.2.0",
+            "nan": "^2.3.3",
+            "typedarray-to-buffer": "^3.1.2",
+            "yaeti": "^0.0.6"
+          }
+        }
       }
     },
     "web3-shh": {
@@ -4887,16 +4900,6 @@
         }
       }
     },
-    "websocket": {
-      "version": "github:frozeman/WebSocket-Node#6c72925e3f8aaaea8dc8450f97627e85263999f2",
-      "from": "github:frozeman/WebSocket-Node#browserifyCompatible",
-      "requires": {
-        "debug": "^2.2.0",
-        "nan": "^2.3.3",
-        "typedarray-to-buffer": "^3.1.2",
-        "yaeti": "^0.0.6"
-      }
-    },
     "which": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",