Replace var (eslint no-var)

Author: jacbn

src/app/components/elements/markup/latexRendering.ts

@@ -173,7 +173,7 @@ interface Search {
 function startMatch(match: RegExpMatchArray): Search {
     const key: string = match[0];
     // @ts-ignore
-    var delim = matchers[key];
+    const delim = matchers[key];
     if (delim != null) {                              // a start delimiter
         return {
             end: delim.end, endPattern: new RegExp(endPattern(delim.end), "g"), mode: delim.mode, pcount: 0,

src/react-app-env.d.ts

@@ -68,11 +68,11 @@ declare module "bootstrap";
 declare module "math-random-seed";
 declare module "highlightjs-vba";
 
-declare var MathJax: any;
-declare var ISAAC_SITE: string;
-declare var REACT_APP_API_VERSION: string;
+declare let MathJax: any;
+declare let ISAAC_SITE: string;
+declare let REACT_APP_API_VERSION: string;
 declare const ENV_QUIZ_FEATURE_FLAG: boolean;
-declare var EDITOR_PREVIEW: boolean;
+declare let EDITOR_PREVIEW: boolean;
 
 declare module "inequality-grammar" {
   export const parseMathsExpression: (exp: string) => (any[]) | ParsingError;