Replaces Minio refs with MinIO and minio.io links with min.io

[ebozduman]

Official company name Minio became MinIO.
This change requires all references in the code and documentation to be modified as MinIO and the links, ....://xxx.minio.io, to be ....://xxx.min.io.

Description of the change

Here are the changes done .

Used Visual Studio Code Editor regular expressions to find and replace those patterns that match the desired text in all minio-js repo files. Here are the two regular expressions used to complete the job in 2 steps:

1. Set files to include to *.md, choose Match Case and Use Regular Expression and replace the links using the following regular expressions:

Find	Replace
(//(slack|docs|play|dl|blog).|//)minio.io	$1min.io

The above regular expression, as can be seen, replaces the links that start with either slack or docs or ``playordl` or `blog` or nothing before `minio.io`.

Find	Replace
\bMinio\b(?!( *=|.| *from))	MinIO

The above regular expression replaces the string "Minio" with "MinIO" except the following forms:

• Minio =, as in a variable setting like var Minio = .... in the code
• Minio. as in Minio.Client in the code
• Minio from as in import * as Minio from ... in the code

Please pay specific attention to the following changes:
gulpfile.js
line# 29

package.json
line#s 19, 21

src/main/minio.js
line#s 108, 111, 226

src/main/test/unit/test.js
line#s 280, 290, 300

[kannappanr]

LGTM