Add version tag in HTML, fix lint error.

web/src/App.vue

@@ -2,6 +2,7 @@
   <div id="app">
     <NavBar></NavBar>
     <router-view class=main />
+    <span id="personal-measure-version" hidden>{{ version }}</span>
   </div>
 </template>
 <script lang="ts" src="./app.ts"></script>

web/src/components/measure-summaries/simple-summary-graph.ts

@@ -16,7 +16,7 @@ export class SimpleSummaryGraph extends Vue {
   };
 
   private get measurementData(): ApexAxisChartSeries {
-    let measurementData = this.measurements.slice() || [];
+    const measurementData = this.measurements.slice() || [];
 
     return [{
       name: this.measure.name,