Release share v0.44.0 (2022-03-02)

=== New features

* lib/time: implement Scheduler
* lib/time: add new type Clock

=== Bug fixes

* lib/clise: fix potential data race between Push and Slice
* lib/memfs: minimize data race on DirWatcher
* go.mod: update all dependencies

=== Chores

* all: set the test timeout to 1m
* all: access embedded field or methods using the type name
* lib/email: add an example for Filter method on Header
* cmd: temporarily hide unused commands
* AUR: add go-test-coverhtml.sh and go-bench.sh into package
* lib/websocket: replace math/rand.Read with crypto/rand.Read
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