fix(types): fix typing error

[nogic1008]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Since PR #327 was merged, tsc throws the following error:

node_modules/@nuxt/content/types/index.d.ts:6:45 - error TS2307: Cannot find module 'node-csvtojson/v2/Parameters' or its corresponding type declarations.

6 import { CSVParseParam as csvOptions } from "node-csvtojson/v2/Parameters";
                                              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Found 1 error.

Probably node-csvtojson is a typo of csvtojson.

And, PR #327 forces you to add an empty content property in configuration file.

This PR fixes module name typo, and set content property as optional.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes (if not applicable, please state why)

No need tests because this PR only changes typing.

[benjamincanac]

Nice catch 🙂