chore: update packages

tested with Vexflow 1.2.89, karma tests, demo samples
removes npm audit warnings

demo: indicate large sample, loading time for Actor Prelude

demo/index.js

@@ -35,7 +35,7 @@ import { OpenSheetMusicDisplay } from '../src/OpenSheetMusicDisplay/OpenSheetMus
         "OSMD Function Test - Ornaments": "OSMD_function_test_Ornaments.xml",
         "OSMD Function Test - Tremolo": "OSMD_Function_Test_Tremolo_2bars.musicxml",
         "Schubert, F. - An Die Musik": "Schubert_An_die_Musik.xml",
-        "Actor, L. - Prelude (Sample)": "ActorPreludeSample.xml",
+        "Actor, L. - Prelude (Large Sample, loading time)": "ActorPreludeSample.xml",
         "Anonymous - Saltarello": "Saltarello.mxl",
         "Debussy, C. - Mandoline": "Debussy_Mandoline.xml",
         "Levasseur, F. - Parlez Mois": "Parlez-moi.mxl",

package.json

@@ -73,7 +73,7 @@
     "http-server": "^0.11.0",
     "increase-memory-limit": "^1.0.6",
     "jquery": "^3.2.1",
-    "karma": "^4.0.0",
+    "karma": "^4.0.1",
     "karma-base64-to-js-preprocessor": "^0.0.1",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",
@@ -86,7 +86,7 @@
     "npm-run-all": "^4.1.2",
     "pre-commit": "^1.2.2",
     "ts-loader": "^4.1.0",
-    "tslint": "^5.8.0",
+    "tslint": "^5.14.0",
     "tslint-loader": "^3.5.3",
     "typedoc": "^0.14.2",
     "typescript": "^2.6.1",
@@ -94,7 +94,7 @@
     "underscore-template-loader": "^1.0.0",
     "webpack": "^4.25.0",
     "webpack-cli": "^3.0.8",
-    "webpack-dev-server": "^3.1.14",
+    "webpack-dev-server": "^3.2.1",
     "webpack-merge": "^4.1.2",
     "webpack-visualizer-plugin": "^0.1.11"
   },