test: modify location of ts-jest config in jest.config.js

[aeworxet]

This PR modifies location of ts-jest config in jest.config.js file to address warning

ts-jest[ts-jest-transformer] (WARN) Define `ts-jest` config under `globals` is deprecated. Please do
transform: {
    <transform_regex>: ['ts-jest', { /* ts-jest config goes here in Jest */ }],
},

PR with changes to ts-jest configuration:
kulshekhar/ts-jest#3780

[aeworxet]

/rtm

[asyncapi-bot]

🎉 This PR is included in version 0.3.8 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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