fix hc wasm 2

[mhuesch]

this reverts part of #73.

my theory of what went wrong

• quickcheck >1.0 has a new dep on getrandom
• getrandom has wasm support (https://docs.rs/getrandom/latest/getrandom/#webassembly-support) but somehow the way they do it (with the js cargo feature flag) conflicts with something that Holochain does
• this causes the following inscrutable-looking error:

Conductor ready.
Error: Failed to install app: Expected AdminResponse::AppBundleInstalled but got Error(InternalError("Conductor returned an error while using a ConductorApi: EntryDefStoreError(DnaError(WasmError(Compile(\"Error while importing \\\"__wbindgen_placeholder__\\\".\\\"__wbindgen_describe\\\": unknown import. Expected Function(FunctionType { params: [I32], results: [] })\"))))"))

(above output comes for commit d388d8c in social_sensemaker repo)

what to do

the best thing would be to fix the root cause.

but my hunch is that it would be complex & take too much time.

so for now, we will keep quickcheck back at 0.9.2 release. perhaps things will get fixed in the meantime 🤷‍♂️