Run 'npm audit fix' due to https://npmjs.com/advisories/1179.

package-lock.json

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@@ -2345,9 +2339,9 @@
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@@ -3439,24 +3433,16 @@
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@@ -4054,9 +4040,9 @@
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@@ -5540,12 +5526,13 @@
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