lint fix

Author: KSDaemon

packages/cubejs-schema-compiler/src/compiler/JoinGraph.ts

@@ -31,7 +31,7 @@ export type JoinHint = string | string[];
 
 export type JoinHints = JoinHint[];
 
-export class JoinGraph implements CompilerInterface{
+export class JoinGraph implements CompilerInterface {
   private readonly cubeValidator: CubeValidator;
 
   private readonly cubeEvaluator: CubeEvaluator;