Release share v0.47.0 (2023-06-04)

=== Breaking changes

* email/maildir: major refactoring plus adding unit tests
* lib/email: unexport the field ContentType in the field

=== Bug fixes

* lib/dns: fix zone parsing on SOA record with single line
* lib/memfs: ignore permission error when scanning directory content
* lib/memfs: fix panic when watched file deleted or renamed
* lib/email: fix parsing multiple parameters in ContentType

=== New features

* cmd/bcrypt: CLI to compare or generate hash using bcrypt
* lib/sql: add type DmlKind
* email/maildir: implement Folder
* lib/net: add function WaitAlive
* lib/smtp: implement Client SendEmail

=== Enhancements

* lib/dns: add option to set debug level in ServerOptions
* lib/dns: do not cache empty answers
* _bin/go-test-coverhtml: add parameter to run specific test
* lib/http: redirect path with slash if request is directory
* lib/email: handle obsolete white spaces and comment when unpacking date
* lib/email: set the Field Type and unpack its value on ParseField
* lib/net: increase the maximum poll events
* lib/websocket: increase the max buffer and queue for better throughput

=== Chores

* all: remove any usage of debug.Value in all packages
* lib/test: update documentation related to Assert and Data
* all: record the contributors of this module in file AUTHORS
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