Crashes with NSInternalInconsistencyException ?

Hi there,

I am working with a slightly modified `taskwarrior-reminders` version corresponding to this commit / PR: https://github.com/blampe/taskwarrior-reminders/pull/11

This is all on an Arm64 M1 MBP running macOS Ventura 13.3 . Taskwarrior was installed via Macports and was at `v2.6.2_0`

`taskwarrior-reminders` was compiled with `make install` and then unhooked from launchd using `make uninstall` . Then I ran it directly from the command line:

```
./task-reminders-sync --all
[Taskwarrior] sync
[task-reminders-sync] We're off to the races!
[Taskwarrior] modified.after:19700101T000000Z export
```

Past this stdout, it didn't do anything until I added a task to my Apple Reminders tasks. Then it produced a lot of output, syncing about ~60 items successfully, and then crashed with this error:

```
[Reminders ▶ Taskwarrior] Throw out Trash
[Taskwarrior] sync
[Taskwarrior] reminderID:CF2D6A7C-D174-5C35-9564-45A2D2B9BAC0 export
2023-04-04 12:17:14.143 task-reminders-sync[67654:1031576] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Failed to set posix_spawn_file_actions for fd -1 at index 2 with errno 9'
*** First throw call stack:
(
0 CoreFoundation 0x000000018c58b19c __exceptionPreprocess + 176
1 libobjc.A.dylib 0x000000018c0aa4d4 objc_exception_throw + 60
2 Foundation 0x000000018d4f6324 -[NSConcreteTask launchWithDictionary:error:] + 4180
3 task-reminders-sync 0x00000001008cf040 $s12Repositories21TaskwarriorRepositoryC04execB033_34B1B378C6FD518C2F80C60344E1C084LL4args5input10Foundation4DataVSgSaySSG_6Models4TaskCSgtFTf4nnd_n + 1672
4 task-reminders-sync 0x00000001008c8700 $s12Repositories21TaskwarriorRepositoryC08upsertToB0y6Models10SyncResultVAE4TaskCF + 244
5 task-reminders-sync 0x00000001008e7e90 $s4Sync17RemindersObserverC12storeChanged12notificationy10Foundation12NotificationV_tFySo10EKReminderCXEfU_yyScMYccfU_ + 364
6 task-reminders-sync 0x00000001008e7ed4 $sIeg_IeyB_TR + 28
7 libdispatch.dylib 0x000000018c282874 _dispatch_call_block_and_release + 32
8 libdispatch.dylib 0x000000018c284400 _dispatch_client_callout + 20
9 libdispatch.dylib 0x000000018c292bf8 _dispatch_main_queue_drain + 928
10 libdispatch.dylib 0x000000018c292848 _dispatch_main_queue_callback_4CF + 44
11 CoreFoundation 0x000000018c553c88 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
12 CoreFoundation 0x000000018c5114a8 __CFRunLoopRun + 1992
13 CoreFoundation 0x000000018c51058c CFRunLoopRunSpecific + 612
14 Foundation 0x000000018d4890bc -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212
15 Foundation 0x000000018d501dbc -[NSRunLoop(NSRunLoop) run] + 64
16 task-reminders-sync 0x00000001008e5f28 main + 120
17 dyld 0x000000018c0dbf28 start + 2236
)
libc++abi: terminating due to uncaught exception of type NSException
zsh: abort ./task-reminders-sync --all
```

Any ideas? My first time working with Swift. `abi` in the error plus the presumption might mean that `amd64` vs `arm64` complications might be at play?

Reproduce the crash with `./task-reminders-sync --all` on the reported macOS and Swift setup, then start from `TaskwarriorRepository.exec` in the stack trace and follow its call from `upsertToTaskwarrior` and `RemindersObserver.storeChanged`. Done means identifying the cause of the NSInternalInconsistencyException, preventing the abort, and verifying that the reported reminder synchronization completes.

Written by the indexing model from the issue text.