diff --git a/package-lock.json b/package-lock.json
index f5533b4..b94df1d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -421,7 +421,8 @@
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       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -834,7 +835,8 @@
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       "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24=",
-      "dev": true
+      "dev": true,
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@@ -1365,6 +1367,7 @@
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       "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
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+      "optional": true,
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@@ -1452,7 +1455,8 @@
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       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2095,7 +2099,8 @@
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       "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2466,6 +2471,7 @@
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       "dev": true,
+      "optional": true,
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@@ -2479,6 +2485,7 @@
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       "integrity": "sha1-RTVSSKiJeQNLZ5Lhm7gfK3l13Q0=",
       "dev": true,
+      "optional": true,
       "requires": {
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@@ -2748,7 +2755,8 @@
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       "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -6457,7 +6465,8 @@
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       "integrity": "sha1-hut1OSgF3cM69xySoO7fdO52BLI=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -6472,7 +6481,8 @@
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       "resolved": "https://registry.npmjs.org/is-date-object/-/is-date-object-1.0.1.tgz",
       "integrity": "sha1-mqIOtq7rv/d/vTPnTKAbM1gdOhY=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -6757,18 +6767,19 @@
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-      "integrity": "sha1-z2EJDaDZ77yrhyLeum8DIgjbsOk=",
+      "integrity": "sha512-Ya1giYJUkcL/94quj0+XGcmts6cETPBW1MiFz1ReJrnDJ680F52qpAEGAEGU0nq96FRGIGPx6Yo1CyPXcOoyGw==",
       "dev": true,
       "optional": true,
       "requires": {
-        "html-comment-regex": "1.1.1"
+        "html-comment-regex": "^1.1.0"
       }
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       "resolved": "https://registry.npmjs.org/is-symbol/-/is-symbol-1.0.1.tgz",
       "integrity": "sha1-PMWfAAJRlLarLjjbrmaJJWtmBXI=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -7964,6 +7975,7 @@
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       "dev": true,
+      "optional": true,
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@@ -11632,7 +11644,8 @@
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       "integrity": "sha1-hFK0u36Dx8GI2AQcGoN8dz1ti7k=",
-      "dev": true
+      "dev": true,
+      "optional": true
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     "yargs": {
       "version": "6.4.0",