Time not implemented on this platform introduced when targeting webassembly

### Summary Using rust libp2p latest master commit as a dependency worked until a few weeks ago, when, "time not implemented on this platform" surfaced as a runtime panic in rust webassembly, solely because of libp2p dependency development. One safe revision to anchor to seems to be: 055186dc3b38f60ee4ff79d7ac71603f9e18124f ### Expected behavior Just no error when using rust wasm ### Actual behavior "time not implemented on this platform" rutime panic ### Relevant log output ```shell ``` ### Possible Solution _No response_ ### Version _No response_ ### Would you like to work on fixing this bug? Yes