Fix upgrade bug.

src/util/java/ClaritasWrapper.ts

@@ -23,7 +23,7 @@ export class ClaritasWrapper extends JarExecutor<ClaritasResult> {
                 this.logger.error('Claritas finished with non-zero exit code, ', code)
                 this.lastExecutionResult = undefined!
             } else {
-                if(pathExists(this.OUTPUT_FILE)) {
+                if(await pathExists(this.OUTPUT_FILE)) {
                     this.lastExecutionResult = JSON.parse((await readFile(this.OUTPUT_FILE)).toString('utf8'))
                 } else {
                     this.logger.error('Claritas output file not found when exit code is 0, is this a bug?')
@@ -61,7 +61,7 @@ export class ClaritasWrapper extends JarExecutor<ClaritasResult> {
     }
 
     private async cleanOutput(): Promise<void> {
-        if(pathExists(this.WORK_DIR)) {
+        if(await pathExists(this.WORK_DIR)) {
             remove(this.WORK_DIR)
         }
     }