docs(fix): fixed misspelled word

- updated helm_test.md

fix(tiller): remove locking system from storage and rely on backend

remove tiller/environment dependency from plugin package

ref(pkg/chartutil): decrease map lookups

Include "seh" as a Helm project maintainer and reviewer

feat(2063): Better 'helm list' visibility into state of pending upgrades

Fixing typos in requirements.yaml part

Move comment out of test. Move ref location in test.

Decrease map lookups in `chartutil.coalesceValues` and move comment to unit
test.

Closes #2663

Tiller currently hangs indefinitely when deadlocks arise from certain
concurrent operations. This commit removes the nested mutex locking
system from pkg/Storage and relies on resource contention controls in k8s.

Closes #2560

fix(helm): fix flag parsing once and for all

fix(dep): Fixes out of date dependency info

The help text for `helm dep` contained out of date info about
referring to a chart repo by name vs. URL.

fix(helm): fix `helm get` subcommands

This correctly sets up the tunnel for `helm get values`, `helm get
manifest`, and `helm get hooks`.

Closes #2617

fix(helm): support HELM_HOME during plugin loading

fix(tests): fix sorting hooks test flake

closes #2630

fix(helm): load home from flags during runtime

Fix a bug causing 'helm depndency update' to delete required charts

ref(tests): simplify kind sorter test

Add the "APIService" kind to the installation sort order

fix(docs): run docs generator