Scheduled weekly dependency update for week 39

Fix `Discussions_by_author_before_date` in `get_discussions`

Account
* some code improvements
Graphenerpc
* small improvement in chain detection
Steem
* replace_steemit_by_steem option removed from get_config
* witness_update fixed
Comment
* Fix docu
chain
* Waleshares added
Unit test
* unit tests fixed

corrected typo

European Financial Transparency Gateway support in Beem

* add claim_account RC calculation
* fix Bytes type
* Improve testnet example
* test_types improved

Using generic asset symbols

invironment -> environment

0.20.5
------
* fix get_effective_vesting_shares()

* get_effective_vesting_shares() added to calculated max_mana correctly
* dict key words adapted to steemd for get_manabar() and get_rc_manabar()
* Voting mana fixed for 0 SP accounts
* comment_benefactor_reward adapted for snapshot
* Custom_json RC costs added to print_info

Account
* add comment, vote, transfer RC costs in account.print_info() and beempy power
* Shows number of possible comments, votes, tranfers with available RCs in account.print_info() and beempy power

RC
* add possibility to specify tx_size instead of constructing a dict for comment, transfer, vote and custom_json 

* get_rc_cost was added to steem to calculation RC costs from resource count

RC
* get_tx_size(), get_resource_count(), comment(), vote(), transfer() and custom_json() added

* estimated_mana is now capped by estimated_max
* print_info fixed()
* get_api_methods() and get_apis() added to Steem

* Improved get_rc_manabar(), get_manabar() output
* get_voting_power() fixed again
* print_info for account improved
* get_manabar_recharge_time_str(), get_manabar_recharge_timedelta() and get_manabar_recharge_time() added
* https://steemd-appbase.steemit.com added to nodelist

* Fully supporting hf20
* add get_resource_params(), get_resource_pool(), claim_account(), create_claimed_account() to Steem
* fix 30x fee for create_account
* add find_rc_accounts() to Blockchain
* get_rc(), get_rc_manabar(), get_manabar() added to Account
* get_voting_power() fixed