Update npm packages

Author: Snuffleupagus

package-lock.json

@@ -34,15 +34,15 @@
     "jsdoc": "^3.6.3",
     "jstransformer-markdown-it": "^2.1.0",
     "merge-stream": "^1.0.1",
-    "mkdirp": "^0.5.1",
+    "mkdirp": "^0.5.3",
     "postcss-calc": "^7.0.2",
     "postcss-css-variables": "^0.14.0",
     "prettier": "^1.19.1",
     "rimraf": "^2.7.1",
     "streamqueue": "^1.1.2",
     "systemjs": "^0.21.6",
     "systemjs-plugin-babel": "^0.0.25",
-    "terser": "^4.6.6",
+    "terser": "^4.6.7",
     "through2": "^3.0.1",
     "ttest": "^2.1.1",
     "typogr": "^0.6.8",