feat: support pipe multiple newline delimited CIDs

[alanshaw]

Allows the user to pipe a file of newline delimited CIDs to the base32 or format command instead of invoking it for each or passing them all as parameters.

The motivation for this originally was to fix an issue where the following command throws an error because the input has a trailing newline:

$ jsipfs id | json id | jsipfs cid base32
bafybeidta3hkxk3ihxfsk765oswgsjhmvcnkeestyuov6r2t5tyts4xuoe
Error: invalid cid: 
    at Object.base32 (/Users/alan/.iim/dists/[email protected]/node_modules/cid-tool/src/core/base32.js:10:11)
  Error: multihash too short. must be > 3 bytes.
    at Function.validateCID (/Users/alan/.iim/dists/[email protected]/node_modules/cids/src/index.js:286:13)
    at new CID (/Users/alan/.iim/dists/[email protected]/node_modules/cids/src/index.js:91:11)
    at new CID (/Users/alan/.iim/dists/[email protected]/node_modules/class-is/index.js:15:17)
    at Object.base32 (/Users/alan/.iim/dists/[email protected]/node_modules/cid-tool/src/core/base32.js:8:11)
    at Socket.<anonymous> (/Users/alan/.iim/dists/[email protected]/node_modules/cid-tool/src/cli/commands/base32.js:17:27)
    at Socket.emit (events.js:210:5)
    at addChunk (_stream_readable.js:326:12)
    at readableAddChunk (_stream_readable.js:301:11)
    at Socket.Readable.push (_stream_readable.js:235:10)
    at Pipe.onStreamRead (internal/stream_base_commons.js:182:23)

Newline delimited data (like ndjson for example) usually ignores a trailing newline so we do the same here, fixing the error but allowing us to easily support multiple CIDs being piped.

I want to add this command in an example for the js-ipfs 0.40 release to show how people could convert their Peer ID to a base32 CID for use in IPNS paths.