Does not install correctly using yarn

[area]

Unlike npm, yarn does not install binaries of dependencies to ./node_modules/.bin (see here). As a result when we try and run testrpc-sc, it fails. This could be fixed by executing ./node_modules/ethereumjs-testrpc-sc/bin/testrpc rather than ./node_modules/.bin/testrpc-sc. Alternatively, the onus could be on the use a tool like yarn-bin-fix.

[cgewecke]

Yes, changing the path here seems reasonable. As long as we're confident that ethereumjs-testrpc-sc will always get installed at that location in node_modules and not be nested somewhere weird. But it should be right?

[cgewecke]

Published with 0.1.4.

[cgewecke]

An additional note here: Have removed the post-install hook from our solidity-parser fork following Elena's observation that yarn dgafs that. So changes there are now slightly more complicated - when we pull the upstream master we have to npm run build and push the build too. And I believe anyone using yarn has to run yarn update solidity-coverage to see it.

If this new approach is mistaken please let me know.