diff --git a/package-lock.json b/package-lock.json
index 51b67993..8cd9d2e2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2094,9 +2094,9 @@
       "dev": true
     },
     "@types/qs": {
-      "version": "6.9.3",
-      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.3.tgz",
-      "integrity": "sha512-7s9EQWupR1fTc2pSMtXRQ9w9gLOcrJn+h7HOXw4evxyvVqMi4f+q7d2tnFe3ng3SNHjtK+0EzGMGFUQX4/AQRA==",
+      "version": "6.9.5",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.5.tgz",
+      "integrity": "sha512-/JHkVHtx/REVG0VVToGRGH2+23hsYLHdyG+GrvoUGlGAd0ErauXDyvHtRI/7H7mzLm+tBCKA7pfcpkQ1lf58iQ==",
       "dev": true
     },
     "@types/resolve": {
@@ -2889,12 +2889,12 @@
       "dev": true
     },
     "buidler-gas-reporter": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/buidler-gas-reporter/-/buidler-gas-reporter-0.1.3.tgz",
-      "integrity": "sha512-3Q27K52iGEghJ4icDdkV/67iJiRCaiZ39E2LLCBNZgx5NvltI5Q7oR3RVyCGO/m3SZBcj418zC8p7yeyj/jFdw==",
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/buidler-gas-reporter/-/buidler-gas-reporter-0.1.4.tgz",
+      "integrity": "sha512-objSu/tGggxKDmlpZViM9uEKRSo7vXxBsPv+vXegre1AWapJXQNfJPtBmrNvnT5Ixl8pecWSRXsfO95nJAn4yw==",
       "dev": true,
       "requires": {
-        "eth-gas-reporter": "^0.2.13"
+        "eth-gas-reporter": "^0.2.18"
       }
     },
     "buidler-typechain": {
@@ -4108,13 +4108,13 @@
       }
     },
     "eth-gas-reporter": {
-      "version": "0.2.17",
-      "resolved": "https://registry.npmjs.org/eth-gas-reporter/-/eth-gas-reporter-0.2.17.tgz",
-      "integrity": "sha512-MsrUqeXTAFU9QEdAIdaVu+QeU1XwFsKvPDEC68iheppVR5xUP11h4SyPhSRZiGfOzXr1CfTtPM/B6wPGtt7/LA==",
+      "version": "0.2.18",
+      "resolved": "https://registry.npmjs.org/eth-gas-reporter/-/eth-gas-reporter-0.2.18.tgz",
+      "integrity": "sha512-P6LQ1QmU9bqU4zmd01Ws/b2EWAD5rT771U0wyJ/c+fKE6RdE9ks8KzjdR1zjosV2uilMfqVTtrBrXveCOnaTyQ==",
       "dev": true,
       "requires": {
         "@ethersproject/abi": "^5.0.0-beta.146",
-        "@solidity-parser/parser": "^0.5.2",
+        "@solidity-parser/parser": "^0.8.0",
         "cli-table3": "^0.5.0",
         "colors": "^1.1.2",
         "ethereumjs-util": "6.2.0",
@@ -4130,6 +4130,27 @@
         "sync-request": "^6.0.0"
       },
       "dependencies": {
+        "@solidity-parser/parser": {
+          "version": "0.8.1",
+          "resolved": "https://registry.npmjs.org/@solidity-parser/parser/-/parser-0.8.1.tgz",
+          "integrity": "sha512-DF7H6T8I4lo2IZOE2NZwt3631T8j1gjpQLjmvY2xBNK50c4ltslR4XPKwT6RkeSd4+xCAK0GHC/k7sbRDBE4Yw==",
+          "dev": true
+        },
+        "elliptic": {
+          "version": "6.5.3",
+          "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.3.tgz",
+          "integrity": "sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==",
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.4.0",
+            "brorand": "^1.0.1",
+            "hash.js": "^1.0.0",
+            "hmac-drbg": "^1.0.0",
+            "inherits": "^2.0.1",
+            "minimalistic-assert": "^1.0.0",
+            "minimalistic-crypto-utils": "^1.0.0"
+          }
+        },
         "ethereumjs-util": {
           "version": "6.2.0",
           "resolved": "https://registry.npmjs.org/ethereumjs-util/-/ethereumjs-util-6.2.0.tgz",
@@ -4146,37 +4167,20 @@
           }
         },
         "ethers": {
-          "version": "4.0.47",
-          "resolved": "https://registry.npmjs.org/ethers/-/ethers-4.0.47.tgz",
-          "integrity": "sha512-hssRYhngV4hiDNeZmVU/k5/E8xmLG8UpcNUzg6mb7lqhgpFPH/t7nuv20RjRrEf0gblzvi2XwR5Te+V3ZFc9pQ==",
+          "version": "4.0.48",
+          "resolved": "https://registry.npmjs.org/ethers/-/ethers-4.0.48.tgz",
+          "integrity": "sha512-sZD5K8H28dOrcidzx9f8KYh8083n5BexIO3+SbE4jK83L85FxtpXZBCQdXb8gkg+7sBqomcLhhkU7UHL+F7I2g==",
           "dev": true,
           "requires": {
             "aes-js": "3.0.0",
             "bn.js": "^4.4.0",
-            "elliptic": "6.5.2",
+            "elliptic": "6.5.3",
             "hash.js": "1.1.3",
             "js-sha3": "0.5.7",
             "scrypt-js": "2.0.4",
             "setimmediate": "1.0.4",
             "uuid": "2.0.1",
             "xmlhttprequest": "1.8.0"
-          },
-          "dependencies": {
-            "elliptic": {
-              "version": "6.5.2",
-              "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.2.tgz",
-              "integrity": "sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==",
-              "dev": true,
-              "requires": {
-                "bn.js": "^4.4.0",
-                "brorand": "^1.0.1",
-                "hash.js": "^1.0.0",
-                "hmac-drbg": "^1.0.0",
-                "inherits": "^2.0.1",
-                "minimalistic-assert": "^1.0.0",
-                "minimalistic-crypto-utils": "^1.0.0"
-              }
-            }
           }
         },
         "hash.js": {
@@ -21252,9 +21256,9 @@
       },
       "dependencies": {
         "@types/node": {
-          "version": "10.17.26",
-          "resolved": "https://registry.npmjs.org/@types/node/-/node-10.17.26.tgz",
-          "integrity": "sha512-myMwkO2Cr82kirHY8uknNRHEVtn0wV3DTQfkrjx17jmkstDRZ24gNUdl8AHXVyVclTYI/bNjgTPTAWvWLqXqkw==",
+          "version": "10.17.42",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-10.17.42.tgz",
+          "integrity": "sha512-HElxYF7C/MSkuvlaHB2c+82zhXiuO49Cq056Dol8AQuTph7oJtduo2n6J8rFa+YhJyNgQ/Lm20ZaxqD0vxU0+Q==",
           "dev": true
         }
       }
@@ -23736,21 +23740,29 @@
       }
     },
     "request-promise-core": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.3.tgz",
-      "integrity": "sha512-QIs2+ArIGQVp5ZYbWD5ZLCY29D5CfWizP8eWnm8FoGD1TX61veauETVQbrV60662V0oFBkrDOuaBI8XgtuyYAQ==",
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.4.tgz",
+      "integrity": "sha512-TTbAfBBRdWD7aNNOoVOBH4pN/KigV6LyapYNNlAPA8JwbovRti1E88m3sYAwsLi5ryhPKsE9APwnjFTgdUjTpw==",
       "dev": true,
       "requires": {
-        "lodash": "^4.17.15"
+        "lodash": "^4.17.19"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "4.17.20",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.20.tgz",
+          "integrity": "sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==",
+          "dev": true
+        }
       }
     },
     "request-promise-native": {
-      "version": "1.0.8",
-      "resolved": "https://registry.npmjs.org/request-promise-native/-/request-promise-native-1.0.8.tgz",
-      "integrity": "sha512-dapwLGqkHtwL5AEbfenuzjTYg35Jd6KPytsC2/TLkVMz8rm+tNt72MGUWT1RP/aYawMpN6HqbNGBQaRcBtjQMQ==",
+      "version": "1.0.9",
+      "resolved": "https://registry.npmjs.org/request-promise-native/-/request-promise-native-1.0.9.tgz",
+      "integrity": "sha512-wcW+sIUiWnKgNY0dqCpOZkUbF/I+YPi+f09JZIDa39Ec+q82CpSYniDp+ISgTTbKmnpJWASeJBPZmoxH84wt3g==",
       "dev": true,
       "requires": {
-        "request-promise-core": "1.1.3",
+        "request-promise-core": "1.1.4",
         "stealthy-require": "^1.1.1",
         "tough-cookie": "^2.3.3"
       }
@@ -24746,9 +24758,9 @@
       },
       "dependencies": {
         "@types/node": {
-          "version": "8.10.61",
-          "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.61.tgz",
-          "integrity": "sha512-l+zSbvT8TPRaCxL1l9cwHCb0tSqGAGcjPJFItGGYat5oCTiq1uQQKYg5m7AF1mgnEBzFXGLJ2LRmNjtreRX76Q==",
+          "version": "8.10.65",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.65.tgz",
+          "integrity": "sha512-xdcqtQl1g3p/49kmcj7ZixPWOcNHA1tYNz+uN0PJEcgtN6zywK74aacTnd3eFGPuBpD7kK8vowmMRkUt6jHU/Q==",
           "dev": true
         }
       }