Use smaller scope for variables

pages/create.js

@@ -181,9 +181,9 @@ class CreateTournamentForm extends React.Component {
     }
 
     createTeamArray(teamnames) {
-        var result = [];
+        let result = [];
 
-        for(var i = 0; i < teamnames.length; i++) {
+        for(let i = 0; i < teamnames.length; i++) {
             result[i] = { 'name': teamnames[i] };
         }
 

pages/tournament-edit.js

@@ -279,7 +279,7 @@ class EditTeamNamesForm extends React.Component {
     }
 
     handleNameInput(index, input) {
-        var team = this.state.teams.slice();
+        let team = this.state.teams.slice();
 
         team[index].name = input.target.value;
 

pages/tournament.js

@@ -363,7 +363,7 @@ function convertGroup(apiGroup) {
 }
 
 function convertMatch(apiMatch) {
-    var result = {
+    let result = {
         id: apiMatch.id,
         state: apiMatch.state
     };