Fix/merge tags type

[davidesamp]

Description

This PR close the following issue https://github.com/BEE-Plugin/Bee-plugin-official/issues/72

Motivation and Context

Types for IMergeTag don't match documentation or HTML output

Usage examples

import BeePLugin from '@mailupinc/bee-plugin'

const mergeTags: IMergeTag[] = [{
  name: 'tag 1',
  value: '[tag1]'
}, {
  name: 'tag 2',
  value: '[tag2]'
}]

const beeConfig :IBeeConfig = {
  uid: 'test1-clientside',
  autosave: 15,
  language: 'en-US',
  mergeTags,
}

const template = { page: { ... } }

const beePlugin = new BeePlugin()
beePlugin.start(beeConfig, template, '', { shared: false })

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

[github-actions[bot]]

Code Coverage Report

Coverage after merging fix/merge-tags-type into master

84.00%

Coverage Report

File	Branches	Funcs	Lines	Uncovered Lines
src
index.ts	50%	7.89%	61.97%	..., 93, 94, 98, 99
src/services
api.ts	100%	50%	100%
axios.ts	100%	100%	100%
src/types
bee.ts	100%	100%	100%
src/utils
Constants.ts	100%	100%	100%
utils.ts	0%	0%	70.59%	..., 8, 8, 9, 9