Merge pull request fatih#87 from SirUela/add-titlecase

Add "Title Case" option

Merge pull request fatih#86 from fatih/fatih-add-quiet-mode

Add `--quiet` flag to suppress output to stdout

Merge pull request fatih#85 from fatih/fatih-add-old-sytle

Change `$field` keyword to `{field}`

Merge pull request fatih#64 from LeGEC/gv/extra-cases

Detect extra cases in struct declarations

Merge pull request fatih#75 from fatih/fatih/test-for-flag-redefinitions

Add test to detect duplicate flag names

Merge pull request fatih#74 from perrito666/add_prefix_to_column_name…

…_tag

Rename `format` to `template` to avoid clash

New Add/Remove prefix option (fatih#69)

* New Add/Remove prefix option

Some libraries like [the gorm ORM](https://github.com/go-gorm/gorm) or
the [gaum SQL query builder](https://github.com/shiftleftsecurity/gaum)
use a prefix in the tag name (ie `gorm:"column:struct_field"`,
gaum:"field_name=struct_field") to help ther Scanner/Valuer interact
with the sql library in go.
This PR adds the ability to add and remove said prefixes.
I used these two libraries as samples in the tests files to help
understand the rationale behind said feature to people reading without
context, hopefully this doesn't break any project convention.

* Add Readme section for prefix

* Replaced prefix with format

* Update main.go

Accepting fatih's suggestion on flag doc

Co-authored-by: Fatih Arslan <[email protected]>

* Update README.md

Accepting fatih's suggestion on `format` flag

Co-authored-by: Fatih Arslan <[email protected]>

* Update README.md

Accepting fatih's suggestion on readme secion title

Co-authored-by: Fatih Arslan <[email protected]>

* Rename formatting var to valueFormat

* Rename $value to $field for clarity

* Update readme too

Co-authored-by: Fatih Arslan <[email protected]>

Merge pull request fatih#71 from fatih/fatih/remove-vendor

Remove vendor folder, update CI Go version to 1.15

Merge pull request fatih#70 from fatih/dependabot/go_modules/github.c…

…om/fatih/structtag-1.2.0

Bump github.com/fatih/structtag from 1.0.0 to 1.2.0

Merge pull request fatih#68 from herryg91/add-modify-tags-by-struct-f…

…ield-name

Adding feature modify tags by struct field name