Merge pull request #9961 from IgniteUI/dpetev/migration-tsconfig-fix

fix(migrations): read tsconfig using typescript's parser

Author: kdinev

projects/igniteui-angular/migrations/common/UpdateChanges.ts

@@ -489,16 +489,15 @@ export class UpdateChanges {
                 return;
             }
             let content;
-            try {
-                // there could be comments in the json file and JSON.parse would fail
-                // TODO: use some 3rd party parser or write our own.
-                // @angular-devkit/core.parseJson is deprecated
-                content = JSON.parse(originalContent);
-            } catch (e: any) {
+            // use ts parser as it handles jsonc-style files w/ comments
+            const result = ts.parseConfigFileTextToJson(TSCONFIG_PATH, originalContent);
+            if (!result.error) {
+                content = result.config;
+            } else {
                 this.context?.logger
                 .warn(`Could not parse ${TSCONFIG_PATH}. Angular Ivy language service might be unavailable during migrations.`);
                 this.context?.logger
-                .warn(`Error:\n${e}`);
+                .warn(`Error:\n${result.error}`);
                 return;
             }
             if (!content.angularCompilerOptions) {