Request to change the name of default importmap from `node.importmap` to `importmap.json`

[JayaKrishnaNamburu]

There is a little bit of disconnect between the cli and using the node-loader.

When we generate an importmap using jspm-cli. It creates an importmap using importmap.json as a default name.
https://github.com/jspm/jspm-cli/blob/b938c175ae040bd8af96a2e60179c4f9c837e008/src/utils.ts#L11

// Default import map to use if none is provided:
const defaultInputPath = "./importmap.json";

But the @jspm/node-importmap-loader expects the default file to be node.importmap
https://github.com/jspm/node-importmap-http-loader/blob/main/src/config.ts#L21

export const nodeImportMapPath = join(root, "node.importmap");

So, when users create a new map using the cli. They have two options.

• Manually change the name of the file from importmap.json to node.importmap. Since the loader doesn't accept the file-name to be passed as an argument as of now.
• Or while creating the importmap using the cli, they need to pass a flag --output node.importmap to avoid manual step.

This creates a little friction and users need to remember about the file name mis-match. To avoid this, the node loader should use importmap.json by default. Since cli is much used and impact more changes there.

Task

• Change the default to importmap.json
• Update all the tests and examples to use importmap.json