Ploomber

- Task's `metadata.params` stores `null` if any parameter isn't serializable
- Task status ignores `metadata.params` if they are `null`
- Fixes unserialization when an upstream task produces a `MetaProduct`

- Adds `remote` parameter to `DAG.render` to check status against remote storage
- `NotebookSource` no longer includes the injected cell in its `str` representation
- `Metadata` uses task params to determine task status
- Support for wildcards when building dag partially
- Support to skip upstream dependencies when building partially
- Faster `File` remote metadata downloads using multi-threading during `DAG.render`
- Faster upstream dependencies parallel download using multi-threading during `Task.build`
- Suppresses papermill `FutureWarning` due to importing a deprecated `pyarrow` module
- Fixes error that caused a warning due to unused env params when using `import_tasks_from`
- Other bug fixes

- `DAGSpec.find` exposes `starting_dir` parameter
- `ploomber install` supports `pip`'s `requirements.txt` files
- `ploomber install` supports non-packages (i.e., no `setup.py`)
- `ploomber scaffold` flags to use conda (`--conda`) and create package (`--package`)

- `ParamGrid` supports initialization from a list
- Adds `tasks[*].grid` to generate multiple tasks at once
- Support for using wildcards to declare dependencies (e.g., `task-*`)
- Fixes to `ploomber scaffold` and `ploomber install`
- `PythonCallable` creates parent directories before execution
- Support for the parallel executor in Spec API
- `DagSpec.find` exposes `lazy_import` argument
- `TaskGroup` internal API changes

- `GCloudStorageClient` loads credentials relative to the project root
- Adds `ploomber install`
- Adds `S3Client`

- `DAGSpec` warns if parameter declared in env but unused
- Implements `{SQLDump, NotebookRunner, PythonCallable}.load()`
- `File.client` downloads during task execution instead of render
- Adds `ploomber.OnlineModel`, which provides a simpler API than `OnlineDAG` for models that implement a `.predict()` method
- Adds function to find package name if using standard layout