Promote EXPERIMENTAL_light_client_proof to non-experimental

[evgenykuzyakov]

Recent change in nearcore promoted the RPC which broke nearlib-tests: near/nearcore#2859

[vgrichina]

Recent change in nearcore promoted the RPC which broke nearlib-tests: near/nearcore#2859

@evgenykuzyakov why not keep experimental_ as alias as well? This doesn't look like good upgradability plan.

[evgenykuzyakov]

That's what I suggested on the attached nearcore change. I also didn't realize that nearlib CI runs on multiple version which requires proper upgradeability. Let's keep the actual RPC endpoint to be EXPERIMENTAL_, but the nearlib method can be without experimental_ prefix.

[vgrichina]

I also didn't realize that nearlib CI runs on multiple version which requires proper upgradeability.

that is done exactly to prevent stuff like this where RPC method just removed abruptly ;)

Let's keep the actual RPC endpoint to be EXPERIMENTAL_, but the nearlib method can be without experimental_ prefix.

Let's also keep old method as alias, but use depd to show deprecation warning (see

near-api-js/src/providers/json-rpc-provider.ts

Line 91 in 30a720c

const deprecate = depd('JsonRpcProvider.block(blockId)');

for example).

Note like it's critical, but makes sense to establish proper deprecation process.