Purpose

Upgrade version fetch-blob from 3.1.4 to 4.0.0
add to cicd version of node "18.18.2", "20.11.0", "21.5.0"
this update will reduce the size of dependencies from about 9.1MB to 0.4MB

Changes

• changed package.json
• in test "supports supplying a famliy option to the agent" add custom callback since http.Agent->lookup changed from v20
• fixed for >v20 route /chunked/multiple-ending in custom server

• I updated readme
• I added unit test(s)
• checked tests for versions 14.21.3, 16.20.2, 18.18.2, 20.11.0, 21.5.0