[High Roller & TicTacToe] Use @counterfactual/apps for dapps

[Alonski]

Currently, in the High Roller and Tic Tac Toe dapps the Contract addresses are hard coded or partially hard coded. This is very error prone especially now that the dapps are in a different repo.

What we currently have:

High Roller currently hard codes the address:

https://github.com/counterfactual/dapps-bots/blob/master/packages/dapp-high-roller/src/components/app-root/app-root.tsx#L206

Tic Tac Toe gets the address using @counterfactual/apps however it hardcodes the network:

https://github.com/counterfactual/dapps-bots/blob/master/packages/dapp-tic-tac-toe/src/Wager.jsx#L78

The flaw with the TTT method is that the network used is hard coded. We can probably figure this out from MetaMask or another method.

What needs to be done:

We need to update High Roller to also use @counterfactual/apps
Then we need to update both dapps to get the network dynamically and act accordingly.