set IgnoreCommas to Option type (#203)

Add exported IgnoreCommas option to fix parser issues (#197)

* attempt to fix weird parse issues

* notice

* add extra check to types

Merge option to replace array values (#193)

* cfgArrReplaceValue applied only for array merge

* add tests

* changelog

Add flag to ignore commas when parsing. (#192)

* Add flag to ignore commas when parsing.

The new flag stops the parser from building arrays automatically when
top level elements are separated with commas. This flag converts parsing
into an actual no-op, passing through the input unmodified. This mode is
necessary when parsing values that may legitimately contain special
characters, like secrets.

* Update changelog.
* Update copyright year.
* Move changelog to a release ahead of tagging.

Releasing version v0.8.4

Prepare for v0.8.3 release. (#153)

Prepare for release of 0.8.2. (#149)

Prepare 0.8.1 (#146)

Prepare 0.8.0 (#143)

Prepare 0.7.0 (#129)