Add support for Node 12.0.0

[RajeshkannanRamakrishnan]

support required for node 12. Getting an error in node 12 `../src/ed25519.cc:19:89: error: no matching member function for call to 'ToObject' ...(!Buffer::HasInstance(info[0])) || (Buffer::Length(info[0]->ToObject()) ...

/Users/<username>/Library/Caches/node-gyp/12.13.1/include/node/v8.h:2576:44: note: 
      candidate function not viable: requires single argument 'context', but no
      arguments were provided
  V8_WARN_UNUSED_RESULT MaybeLocal<Object> ToObject(
                                           ^
`

[palasinio]

Has someone found an Node ed25519 implementation building with node 12?

[palasinio]

You can find a later fork here: https://github.com/pokt-network/ed25519

[RajeshkannanRamakrishnan]

You can find a later fork here: https://github.com/pokt-network/ed25519

test cases are failing

[p3root]

Same issue with node14 on windows and debian! I guess it's the same issue!

error C2660: 'v8::Value::ToObject': function does not take 0 arguments [C:\dev\saiive\saiive\src\saiive.mo bile\saiive\node_modules\ed25519\build\ed25519.vcxproj]

[erikmav]

See https://github.com/gaoxiangxyz/ed25519/pull/2 for another diff for Node 12.

[erikmav]

Merged the changes from https://github.com/gaoxiangxyz/ed25519/pull/2 into master to convert to Node 12's API changes. I'll update the published package when I have permissions.