diff --git a/package-lock.json b/package-lock.json
index 3c2c613..027143c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -819,9 +819,9 @@
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-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.1.1.tgz",
-      "integrity": "sha512-DkN66hPyqDhnIQ6Jcsvx9bFjhw214O4poMBcIMgPVpQvNy9a0e0Uhg5SqySyDKAmUlwt8LonTBz1ezOnM8pUdA==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.4.0.tgz",
+      "integrity": "sha512-jItXPLmrSR8jmTRmRWJXCnGJsfy85mB3Wd/uINMXA65yrnFo0cPClFIUWzo2najVNSl+mx7/4W8ttlLWJe99pQ==",
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@@ -851,9 +851,9 @@
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-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.0.tgz",
+      "integrity": "sha512-fZEwUGbVl7kouZs1jCdMLdt95hdIv0ZeHg6L7qPeciMZhZ+/gdesW4wgTARkrFWEpspjEATAzUGPG8N2jJiwbg=="
     },
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@@ -910,11 +910,11 @@
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-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.2.0.tgz",
-      "integrity": "sha512-6YqyX6ZWEYguAxgZzHGL7SsCeGx3V2TtOTqZz1xSTSWnqsbWwbptafNyvf/ACquZUXV3DANr5BDIwNYe1mN42w==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
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+        "safe-buffer": "~5.2.0"
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@@ -948,12 +948,11 @@
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-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/through2/-/through2-3.0.0.tgz",
-      "integrity": "sha512-8B+sevlqP4OiCjonI1Zw03Sf8PuV1eRsYQgLad5eonILOdyeRsY27A/2Ze8IlvlMvq31OH+3fz/styI7Ya62yQ==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/through2/-/through2-3.0.1.tgz",
+      "integrity": "sha512-M96dvTalPT3YbYLaKaCuwu+j06D/8Jfib0o/PxbVt6Amhv3dUAtW6rTV1jPgJSBG83I/e04Y6xkVdVhSRhi0ww==",
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-        "readable-stream": "2 || 3",
-        "xtend": "~4.0.1"
+        "readable-stream": "2 || 3"
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@@ -1066,11 +1065,6 @@
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-    "xtend": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
-    },
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       "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",