diff --git a/package-lock.json b/package-lock.json
index a0fe113..a4dafa1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "sigplot",
-  "version": "2.0.0-rc18",
+  "version": "2.0.0-rc19",
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       "dev": true,
+      "optional": true,
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       }
@@ -1250,6 +1251,32 @@
       "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
       "dev": true
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+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
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+      "dev": true,
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+          "dev": true,
+          "requires": {
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+        "color-name": {
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+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
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+          "dev": true
+        }
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       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-2.0.0.tgz",
@@ -1264,7 +1291,8 @@
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-      "dev": true
+      "dev": true,
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@@ -1313,6 +1341,7 @@
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+      "optional": true,
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@@ -1778,6 +1807,7 @@
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       "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
       "dev": true,
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@@ -2113,7 +2143,8 @@
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-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2211,6 +2242,16 @@
         "lodash": "4.17.15"
       }
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+    "chalk": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      }
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@@ -2545,7 +2586,8 @@
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-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2924,7 +2966,8 @@
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       "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2970,7 +3013,8 @@
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-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -3326,6 +3370,7 @@
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       "integrity": "sha1-UQnWLz5W6pZ8S2NQWu8IKRyKUgM=",
       "dev": true,
+      "optional": true,
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@@ -3908,7 +3953,7 @@
       "integrity": "sha1-N5MKpdgWt3fANEXhlmzGeQpMCxY=",
       "dev": true,
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-        "glob": "5.0.15"
+        "glob": "~5.0.0"
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@@ -3917,11 +3962,11 @@
           "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
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-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "2 || 3",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
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@@ -4097,6 +4142,7 @@
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       "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
       "dev": true,
+      "optional": true,
       "requires": {
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@@ -4112,7 +4158,8 @@
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           "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
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@@ -4337,26 +4384,68 @@
       "dev": true
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-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.2.1.tgz",
-      "integrity": "sha512-zgJjn9N56tScvRt/y0+1QA+zDBnKTrkpyeSBqQPLcZvbqTD/oyGMrdZQXmm6I3828s+FmPvxc3Xv+lgKFtudOw==",
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-        "eventemitter2": "0.4.14",
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-        "minimatch": "3.0.4",
-        "mkdirp": "1.0.4",
-        "nopt": "3.0.6",
-        "rimraf": "3.0.2"
+      "version": "1.5.3",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
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+      "dev": true,
+      "requires": {
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+        "eventemitter2": "~0.4.13",
+        "exit": "~0.1.2",
+        "findup-sync": "~0.3.0",
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+        "grunt-cli": "~1.4.3",
+        "grunt-known-options": "~2.0.0",
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+        "nopt": "~3.0.6",
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+            "interpret": "~1.1.0",
+            "liftup": "~3.0.1",
+            "nopt": "~4.0.1",
+            "v8flags": "~3.2.0"
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+              "resolved": "https://registry.npmjs.org/nopt/-/nopt-4.0.3.tgz",
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+              "dev": true,
+              "requires": {
+                "abbrev": "1",
+                "osenv": "^0.1.4"
+              }
+            }
+          }
+        },
+        "grunt-known-options": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/grunt-known-options/-/grunt-known-options-2.0.0.tgz",
+          "integrity": "sha512-GD7cTz0I4SAede1/+pAbmJRG44zFLPipVtdL9o3vqx9IEyb7b4/Y3s7r6ofI3CchR5GvYJ+8buCSioDv5dQLiA==",
+          "dev": true
+        },
+        "v8flags": {
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+          "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
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+          "dev": true,
+          "requires": {
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+          }
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     "grunt-browserify": {
@@ -4847,6 +4936,15 @@
         "underscore.string": "3.3.5"
       },
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+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
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+          "dev": true,
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+          }
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@@ -4855,6 +4953,94 @@
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+            "supports-color": "^5.3.0"
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+          "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.2.1.tgz",
+          "integrity": "sha512-zgJjn9N56tScvRt/y0+1QA+zDBnKTrkpyeSBqQPLcZvbqTD/oyGMrdZQXmm6I3828s+FmPvxc3Xv+lgKFtudOw==",
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+            "eventemitter2": "~0.4.13",
+            "exit": "~0.1.2",
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+            "exit": "~0.1.1",
+            "getobject": "~0.1.0",
+            "hooker": "~0.2.3",
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@@ -4935,73 +5121,87 @@
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-        "hooker": "0.2.3",
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