-t supports text types and can set the number of concurrencies.

[iteyelmp]

Change

1. The --type parameter supports string calldata and blob in addition to 1 and 2.
2. Upload adds a new parameter to specify the number of concurrent uploads.
3. Update Readme.

Local test:

1. git clone https://github.com/ethstorage/ethfs-cli.git
2. git checkout -b new origin/type
3. yarn install
4. npm link

Test case:

On a chain that supports Blob:

1. Create a contract.
2. Set default file
3. Use calldata to upload file.
4. Use blob to upload file.
5. Use calldata to upload files in a folder
6. Use blob to upload files in a folder
7. After uploading part of the calldata or blob, terminate the upload task and restart uploading again to test the speed of comparing the uploaded files.
8. Download file.
9. If all functions are normal, the test passes.

On a chain that does not support Blobs.

1. Create a contract.
2. Set default file
3. Use calldata to upload file.
4. Use calldata to upload the folder
5. After uploading some files, terminate the upload task and restart uploading again.
6. Download file.
7. If all functions are normal, the test passes.