Merge duplicate keys in the config file

Remove the duplicate key linters-settings by merging the two linters-settings entries.
The latest version of golangci-lint (v1.48.0) doesn't allow duplicate keys in the config yaml file.

v1.3.1

What's Changed

• replace golint with revive after version v1.41.0 by @ManoelMilchev in #9

New Contributors

• @ManoelMilchev made their first contribution in #9

Full Changelog: v1.3.0...v1.3.1

Add linter for unused parameters

Merge pull request #8 from Financial-Times/feature/add-unparam

Enable the linter for unused parameters

Enable gocognit linter

Merge pull request #6 from Financial-Times/feature/enable-gocyclo

Enable gocognit and configure it to report complexity over 20

Add whitespace linter

Merge pull request #5 from Financial-Times/feature/add-whitespace-linter

Enable whitespace linter

test-v.1.0.1: Remove unused linter - seems it's causing problems with golangci

After upgrading to GO 1.14 we got errors running golangci.
No better solution was proposed in the golangci issues.

Initial release

Merge pull request #1 from Financial-Times/go-linting

Go linting and golangci config