<commit_before># grinder.dart changes

## 0.8.7
- Declare `Never` instead of `Null` for `fail()` and `GrinderContext.fail()`.
- Make the `args` parameter to `GrinderTask.execute()` optional.
- Support null-safety mode.

## 0.8.6
- Declare a `Null` return type for `fail()` and `GrinderContext.fail()`.

## 0.8.5
- Broaden the `cli_util` dependency to be compatible with version 0.2.0.

## 0.8.4
- Update the code to be `package:pedantic` v1.9.0 compliant.

## 0.8.3+1
- Mark `fail()` and `GrinderContext.fail()` as `@alwaysThrows`.<commit_msg>update the version in the changelog (#370)<commit_after># grinder.dart changes

## 0.8.7-nullsafety.1
- Declare `Never` instead of `Null` for `fail()` and `GrinderContext.fail()`.
- Make the `args` parameter to `GrinderTask.execute()` optional.
- Support null-safety mode.

## 0.8.6
- Declare a `Null` return type for `fail()` and `GrinderContext.fail()`.

## 0.8.5
- Broaden the `cli_util` dependency to be compatible with version 0.2.0.

## 0.8.4
- Update the code to be `package:pedantic` v1.9.0 compliant.

## 0.8.3+1
- Mark `fail()` and `GrinderContext.fail()` as `@alwaysThrows`.
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