Release v0.4.1-rc3

Increase Blocktime to 12sec (#344)

* Increase Blocktime to 12s
* Prepare for release, update testcase
* Updated default chain spec by running ./target/release/polkadex-node build-spec --disable-default-bootnode --raw --chain udon > docs/customSpecRaw.json

Co-authored-by: Fredrik Simonsson <simson@polkadex.trade>

Release v0.4.1-rc2

Updated testnet

Release v0.4.1-rc1

Update depencies and chainspec

Release v0.4.0

Document how to run a  validator (Polkadex) (#301)

* update validator doc
* prepare for v0.4.0 release
* fix comments
* Update after review
* Updated screenshots

Co-authored-by: Fredrik Simonsson <simson@polkadex.trade>
Co-authored-by: Pablo  <89174304+pdexpab@users.noreply.github.com>

Release v0.4.0-rc3

Updated init script to download toolchains