TYPO3 Core

https://review.typo3.org/c/Packages/TYPO3.CMS/+/69174 added a composer/ directory which may contain `*.ts` files once `composer install` has been executed.
Therefore typescript will try to compile and warn about invalid files (as some tests contain typoscript ts files):

grunt tsconfig exec:ts copy:ts_files terser:typescript
Running "tsconfig" task

Running "exec:ts" (exec) task
composer/public/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/Basic.ts:1:8 - error TS1005: ';' expected.

1 config {
         ~

composer/public/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/Basic.ts:7:21 - error TS1161: Unterminated regular expression literal.

7     absRefPrefix = /

composer/public/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/Basic.ts:16:16 - error TS1005: ';' expected.

16 lib.viewConfig {
                  ~

composer/public/typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/Basic.ts:17:23 - error TS1005: ';' expected.

17     templateRootPaths {