* fix(TextBasedChannel): return a promise in startTyping
This fixes#2040
Calling TextBasedChannel#startTyping now returns a promise.
This promise resolves when the bot stops typing (TextBasedChannel#stopTyping) or rejects when an error occurs.
Calling the method again returns the same promise as long the bot is still typing.
* move code into the promise' executor
* Clarify the purpose of the returned Promise
* inverse if and clarify count parameter
* docs: Add/normalize .toString() examples on all classes
* docs: Remove exclamation point on ClientApplication#toString example
* docs: Normalize .toString() descriptions on all classes
* Use "returns" instead of "concatenates"
* docs: fix documentation in various places
All stores: resolveID returns a nullable Snowflake
GuildAuditLogs: ActionType also can be ALL
MessageEmbed: make files property show up in the docs
ClientApplication: resetSecret and resetToken return a promise
ClientManager: status is readonly
Guild: features is an array of strings and ban no longer accepts a number or string
Guild: ban method no longer accepts a string or number
GuildMember: ^
RichPresenceAssets: small and large Image are Snowflakes, also fixed parameter documentation for small and large image url method
WebhookMessageOptions: file property is no longer a thing
* docs: improve GuildAuditLogs documentation
Prefix types with AuditLog to avoid confusion
Document GuildAuditLogs' static Targets and Actions properties and add necessary typedefs
Use typdefs over primitives where possible.
* fix documentation for Guild#defaultRole
The UserGetAction was never used.
The GuildMemberGetAction was only once used.
Easily replaced with a shorter and more comprehensible line. (Also consistent with the rest of the library)
