Migration from 1.10.0 to 2 fails because it could not parse tsconfig.base.json

Describe the bug

❯ ng update apollo-angular --migrate-only --from 1.10.0
Using package manager: 'npm'
Collecting installed dependencies...
Found 98 dependencies.
** Executing migrations of package 'apollo-angular' **

❯ Update to Apollo Angular 2 and Apollo Client 3
✖ Migration failed: Couldn't parse tsconfig.base.json!
  See "/private/var/folders/yz/pntm5xh11mjb3ckzvf10ql180000gn/T/ng-a1WVn4/angular-errors.log" for further details.

[error] Error: Couldn't parse tsconfig.base.json!
    at Object.getJsonFile (PROJECT_ROOT/node_modules/apollo-angular/schematics/utils/file.js:29:15)
    at PROJECT_ROOT/node_modules/apollo-angular/schematics/migrations/v2.js:79:42
    at Generator.next (<anonymous>)
    at PROJECT_ROOT/node_modules/apollo-angular/node_modules/tslib/tslib.js:114:75
    at new Promise (<anonymous>)
    at Object.__awaiter (PROJECT_ROOT/node_modules/apollo-angular/node_modules/tslib/tslib.js:110:16)
    at migrateTsConfig (PROJECT_ROOT/node_modules/apollo-angular/schematics/migrations/v2.js:69:20)
    at MergeMapSubscriber.project (PROJECT_ROOT/node_modules/@angular-devkit/schematics/src/rules/call.js:75:24)
    at MergeMapSubscriber._tryNext (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/operators/mergeMap.js:69:27)
    at MergeMapSubscriber._next (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/operators/mergeMap.js:59:18)
    at MergeMapSubscriber.Subscriber.next (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/Subscriber.js:66:18)
    at MergeMapSubscriber.notifyNext (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/operators/mergeMap.js:95:26)
    at InnerSubscriber._next (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/InnerSubscriber.js:28:21)
    at InnerSubscriber.Subscriber.next (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/Subscriber.js:66:18)
    at MergeMapSubscriber.notifyNext (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/operators/mergeMap.js:95:26)
    at InnerSubscriber._next (PROJECT_ROOT/node_modules/@angular-devkit/schematics/node_modules/rxjs/internal/InnerSubscriber.js:28:21)

To Reproduce Steps to reproduce the behavior:

Expected behavior

Environment:

• @apollo/client: 3.1.3
• apollo-angular: 2.0.3
• graphql: 15.3.0
• @angular/core: 10.0.10
• @angular/cli: 10.0.6
• typescript: 3.9.7

Yes it is latest because I did npm up but now want to migrate manually.

Additional context

tsconfig.json

/*
  This is a "Solution Style" tsconfig.json file, and is used by editors and TypeScript’s language server to improve development experience.
  It is not intended to be used to perform a compilation.

  To learn more about this file see: https://angular.io/config/solution-tsconfig.
*/
{
  "files": [],
  "references": [
    {
      "path": "./tsconfig.app.json"
    },
    {
      "path": "./tsconfig.spec.json"
    },
    {
      "path": "./cypress/tsconfig.json"
    },
    {
      "path": "./tsconfig.worker.json"
    }
  ]
}

tsconfig.base.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./out-tsc/dist",
    "strict": true,
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noFallthroughCasesInSwitch": true,
    "forceConsistentCasingInFileNames": true,
    "strictPropertyInitialization": false,
    "strictNullChecks": true,
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "module": "ES2020",
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "ES2015",
    "lib": [
      "ES2018",
      "DOM"
    ]
  },
  "angularCompilerOptions": {
    "fullTemplateTypeCheck": true,
    "strictInjectionParameters": true,
    // "strictTemplates": true // NOTE: https://github.com/angular/angular/issues/25963
  }
}

[kamilkisiela]

v2.0.4 should fix it, try again

[kamilkisiela]

@muuvmuuv #1549 should fix it