[Snyk] Upgrade @polkadot/api from 1.16.1 to 1.22.1

[snyk-bot]

Snyk has created this PR to upgrade @polkadot/api from 1.16.1 to 1.22.1.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 51 versions ahead of your current version.
• The recommended version was released a month ago, on 2020-06-30.

The recommended version fixes:

Severity	Issue	Exploit Maturity
	Cryptographic Issues SNYK-JS-ELLIPTIC-571484	Proof of Concept

Release notes

Package name: @polkadot/api

• 1.22.1 - 2020-06-30
  
  • Important Substrate changed the treasury tip structure, on older chains supply OpenTip: 'OpenTipTo225'
  • Allow for [u8; 33] in U8aFixed (Thanks to https://github.com/akru)
  • Improve derive accountId -> accountIndex lookups (optimize entries queries)
  • Vesting balance calculations via derive.balances.all has been updated for locks
  • Add derive for multi staking rewards with specified eras
  • @polkadot/util 2.16
• 1.22.0-beta.5 - 2020-06-29
• 1.22.0-beta.4 - 2020-06-28
• 1.22.0-beta.3 - 2020-06-24
• 1.22.0-beta.2 - 2020-06-24
• 1.22.0-beta.1 - 2020-06-23
• 1.22.0-beta.0 - 2020-06-23
• 1.21.1 - 2020-06-23
  
  • Fix subscriptions never unsubscribing after the id swap in 1.18.1 (Thanks to https://github.com/dillu24 for testing iterations)
  • Add support for CheckMortality signed extension (old CheckEra is now an alias)
  • Promise API will default to using getStorage on non-subscription calls, reducing RPC overhead
  • Optimize derive BN allocations, using in-place operators as applicable
  • Add new substrate types for Babe EquivocationProof
  • Adjust Releases enum to use a shared instance
• 1.21.0-beta.4 - 2020-06-23
• 1.21.0-beta.3 - 2020-06-23
• 1.21.0-beta.2 - 2020-06-23
• 1.21.0-beta.1 - 2020-06-23
• 1.21.0-beta.0 - 2020-06-23
• 1.20.1 - 2020-06-22
  
  • Important RPC for account_nextIndex has been moved to system_accountNextIndex (Aligning with Substrate as a primary alias)
  • Cleanup map entries support with only Substrate 2.0-era RPCs (as introduced)
  • Add system_dryRun RPC
  • Optimize derive.staking.queryMulti retrievals with additional per-type batching
  • Add derive.staking.waitingInfo (same as electedInfo for waiting validators)
  • Adjust types & metadata for latest Substrate
  • @polkadot/util 2.15
• 1.20.0-beta.9 - 2020-06-22
• 1.20.0-beta.8 - 2020-06-22
• 1.20.0-beta.7 - 2020-06-21
• 1.20.0-beta.6 - 2020-06-21
• 1.20.0-beta.5 - 2020-06-20
• 1.20.0-beta.4 - 2020-06-20
• 1.20.0-beta.3 - 2020-06-19
• 1.20.0-beta.2 - 2020-06-18
• 1.20.0-beta.1 - 2020-06-18
• 1.20.0-beta.0 - 2020-06-17
• 1.19.1 - 2020-06-16
  
  • Improve typing on .entries() queries (Thanks to https://github.com/monitz87)
  • Align metadata and types with latest Substrate
  • Update Polkadot types for current evolution of parachains
  • Allow for type aliasing on events (aligning with calls & queries)
• 1.19.0-beta.3 - 2020-06-12
• 1.19.0-beta.2 - 2020-06-12
• 1.19.0-beta.1 - 2020-06-11
• 1.19.0-beta.0 - 2020-06-10
• 1.18.1 - 2020-06-08
  
  • Expand docs on node-template types (Thanks to https://github.com/g2udevelopment)
  • Update contract fees to current impl. (Thanks to https://github.com/djuanit0x)
  • Allow Option types in enum/Result type generation (Thanks to http://github.com/xlc)
  • Add .entriesPaged and .keysPaged methods for state maps (https://github.com/monitz87)
  • Support for latest Polkadot CC1, Kusama, Westend & Substrate types
  • Add types for new Substrate proxy module
  • Adjust types for new Substrate (renamed) npos-elections module
  • Call now exposes method & section fields (aligned with toHuman() representation)
  • Cater for new Substrate string subscription ids (with backwards compatibility)
  • @polkadot/util 2.13
• 1.18.0-beta.10 - 2020-06-08
• 1.18.0-beta.9 - 2020-06-08
• 1.18.0-beta.8 - 2020-06-08
• 1.18.0-beta.7 - 2020-06-07
• 1.18.0-beta.6 - 2020-06-07
• 1.18.0-beta.5 - 2020-06-06
• 1.18.0-beta.4 - 2020-06-05
• 1.18.0-beta.3 - 2020-06-03
• 1.18.0-beta.2 - 2020-06-03
• 1.18.0-beta.1 - 2020-06-03
• 1.17.2 - 2020-06-02
  
  • Ensure subscription promise resolves before first result
• 1.17.1 - 2020-06-02
  
  • Fix ElectionSize type (Thanks to https://github.com/arjanz)
  • Allow BTreeSet decoding from Array/JSON inputs
  • Adjust Call-only metadata output to trim documentation to first full line
  • Safeguard against divide-by-zero for total era points (expired reward eras)
  • Internal derive optimizations with combining calls
  • Support for latest Substrate types & metadata
  • @polkadot/util 2.12
• 1.17.0-beta.8 - 2020-06-02
• 1.17.0-beta.7 - 2020-06-02
• 1.17.0-beta.6 - 2020-05-31
• 1.17.0-beta.5 - 2020-05-28
• 1.17.0-beta.4 - 2020-05-28
• 1.17.0-beta.3 - 2020-05-28
• 1.17.0-beta.2 - 2020-05-28
• 1.17.0-beta.1 - 2020-05-28
• 1.17.0-beta.0 - 2020-05-27
• 1.16.1 - 2020-05-26

from @polkadot/api GitHub release notes

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