Class “does not comply with psr-4 autoloading standard.” when trying to develop a composer package in Laravel

Trying to develop a package locally within a Laravel application. In my root laravel application I have a packages directory, structure below

packages
└── deco-network-api
    ├── composer.json
    ├── src
    │   └── BananaMoonClothing
    │       └── DecoNetworkApiClient
    │           ├── DecoNetworkApiClient.php
    │           └── DecoNetworkApiServiceProvider.php
    └── vendor
        ├── autoload.php
        └── composer
            ├── ClassLoader.php
            ├── LICENSE
            ├── autoload_classmap.php
            ├── autoload_namespaces.php
            ├── autoload_psr4.php
            ├── autoload_real.php
            ├── autoload_static.php
            └── platform_check.php

7 directories, 12 files

composer.json of the package

{
    "name": "banana-moon-clothing/deco-network-api",
    ...
    "autoload": {
        "psr-4": {
            "BananaMoonClothing\DecoNetworkApiClient\": "src/"
        }
    },
    "extra": {
        "laravel": {
            "providers": [
                "BananaMoonClothing\DecoNetworkApiClient\DecoNetworkApiServiceProvider"
            ]
        }
    },
    ...
}

Snippet from packages/deco-network-api/src/BananaMoonClothing/DecoNetworkApiClient/DecoNetworkApiClient.php

<?php

namespace BananaMoonClothingDecoNetworkApiClient;

...

class DecoNetworkApiClient
{
    ...
}

Snippet from packages/deco-network-api/src/BananaMoonClothing/DecoNetworkApiClient/DecoNetworkApiServiceProvider.php

<?php

namespace BananaMoonClothingDecoNetworkApiClient;

...

class DecoNetworkApiServiceProvider extends ServiceProvider
{
   ...
}

I’m requiring the package in my laravel Application, as below

{
    "name": "laravel/laravel",
    ...
    "require": {
        ...
        "banana-moon-clothing/deco-network-api": "^1.0.0"
    },
    ...
    "repositories": [
        {
            "type": "path",
            "url": "./packages/deco-network-api"
        }
    ],
    ...
}

When ever I run composer update from the larave application I get the following

...
Class BananaMoonClothingDecoNetworkApiClientDecoNetworkApiServiceProvider located in ./vendor/banana-moon-clothing/deco-network-api/src/BananaMoonClothing/DecoNetworkApiClient/DecoNetworkApiServiceProvider.php does not comply with psr-4 autoloading standard. Skipping.
Class BananaMoonClothingDecoNetworkApiClientDecoNetworkApiClient located in ./vendor/banana-moon-clothing/deco-network-api/src/BananaMoonClothing/DecoNetworkApiClient/DecoNetworkApiClient.php does not comply with psr-4 autoloading standard. Skipping.
> IlluminateFoundationComposerScripts::postAutoloadDump
> @php artisan package:discover --ansi

In ProviderRepository.php line 206:

  Class "BananaMoonClothingDecoNetworkApiClientDecoNetworkApiServiceProvider" not found


Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1

I can’t for the life of me see what the issue might be, I think I’ve just done something silly.