build: publish to npm only if needed

[peterpeterparker]

Motivation

So far, we've been incrementing the version of all libraries when we publish, even if some of them received no improvements or fixes. I find this approach a bit cumbersome. Since I propose to commit to semantic versioning (#431), a better approach would be most welcomed. That's why this PR introduces a publication script that handles the publishing of libraries only if they were actually modified.

Changes

• use shasum to compare local library with npm and publish only upon differences

[github-actions]

size-limit report 📦

Path	Size
@dfinity/ckbtc	6.38 KB (0%)
@dfinity/cmc	1.01 KB (0%)
@dfinity/ledger	2.92 KB (0%)
@dfinity/nns	29.79 KB (0%)
@dfinity/nns-proto	76.3 KB (0%)
@dfinity/sns	14.85 KB (0%)
@dfinity/utils	3.81 KB (0%)
@dfinity/ic-management	1.94 KB (0%)

[lmuntaner]

LGTM, how did you test that it works?

[peterpeterparker]

LGTM, how did you test that it works?

I compared with juno-js.

I get different shasum using ic-js, which is correct as most recent changes are not published, and similar shasum in juno-js because of the contrary.

[lmuntaner]

LGTM, how did you test that it works?

I compared with juno-js.

I get different shasum using ic-js, which is correct as most recent changes are not published, and similar shasum in juno-js because of the contrary.

Thanks!