v4.0.11

• meta: added nyc for coverage file gen
• meta: added husky npm test pre-commit hook
• meta: refactored to async/await instead of Promises where possible
• meta: refactored examples to reduce boilerplate and normalize output
• meta: removed example script runners from package.json
• examples: removed CLI scripts in favour of a dedicated bfx-cli module
• examples: renamed 'orders' to 'list-open-orders'
• examples: positions now always includes P/L
• WSv2: support '*' filter value to match all
• WSv2: added sequencingEnabled() method
• WSv2: added usesAgent() method
• WSv2: added getURL() method
• WSv2: fix in cancelOrders() to prevent context clobber for this.cancelOrder() call
• WSv2: default connection url now exposed on WSv2.url
• WSv2: removed unused prec/len params from unsubscribeOrderBook()
• WSv2: removed unused rawMsg param from _handleEventMessage()
• WSv2: fix getDataChannelId() not filtering by channel type
• WS2Manager: reconnect() and close() now return promises
• WS2Manager: added getAuthArgs()
• WS2Manager: added missing tests