updated node_modules with npm update

- bootstrap 4.1.2 to 4.3.1
- chart.js 2.7.2 to 2.8.0
- jquery 3.3.1 to 3.4.1
- popper.js 1.14.3 to 1.15.0
- browser-sync 2.24.5 to 2.26.5
- clean-css-cli 4.1.11 to 4.3.0
- eslint-plugin-compat 2.5.0 to 2.7.0
- node-sass 4.9.2 to 4.12.0
- nodemon 1.18.2 to 1.19.0
- npm-run-all 4.1.3 to 4.1.5
- uglify-js 3.4.4 to 3.5.13

plugins/chart.js/Chart.css

@@ -0,0 +1,47 @@
+/*
+ * DOM element rendering detection
+ * https://davidwalsh.name/detect-node-insertion
+ */
+@keyframes chartjs-render-animation {
+	from { opacity: 0.99; }
+	to { opacity: 1; }
+}
+
+.chartjs-render-monitor {
+	animation: chartjs-render-animation 0.001s;
+}
+
+/*
+ * DOM element resizing detection
+ * https://github.com/marcj/css-element-queries
+ */
+.chartjs-size-monitor,
+.chartjs-size-monitor-expand,
+.chartjs-size-monitor-shrink {
+	position: absolute;
+	direction: ltr;
+	left: 0;
+	top: 0;
+	right: 0;
+	bottom: 0;
+	overflow: hidden;
+	pointer-events: none;
+	visibility: hidden;
+	z-index: -1;
+}
+
+.chartjs-size-monitor-expand > div {
+	position: absolute;
+	width: 1000000px;
+	height: 1000000px;
+	left: 0;
+	top: 0;
+}
+
+.chartjs-size-monitor-shrink > div {
+	position: absolute;
+	width: 200%;
+	height: 200%;
+	left: 0;
+	top: 0;
+}