Release v0.2.1

[gigony]

• Release current origin/main as v0.2.1 (tagging 0.2.1)
• Update v0.2 and v0.2.1 branches for tracking the version.
• Create a tag 0.2.1 for v0.2.1
• Doc: https://docs.monai.io/projects/monai-deploy-app-sdk/en/0.2.1/

This PR also has some changes

• Fix CVE-2021-33430
  • 47625db
• Use local MONAI App Sdk module when packaging
  • 5a8a327
  • https://github.com/Project-MONAI/monai-deploy-app-sdk/pull/250/files#diff-23233b22a8be7ec5f297f667c8333b94c4cfa941b6f39d5376ad6826bb819d53L15

v0.2.1 has the following changes, compared with v0.2.0

• Fixed minor dependencies for fresh deployment #208
• Fix minor typo in chapter 4 notebook #209
• Bump numpy >= 1.20 to avoid MKL error in conda env, and add --upgrade for pip install app sdk #211
• Update notebooks with cloning repo and building MIS container #214
• Update notebooks with cloning repo and building MIS container #215
• Change the model name in the Spleen seg example dataset to model.ts #222
• Remove developer names/aliases from notebooks and documentation #225
• Fixed empty documentation on docs.monai #233
• Handle exception case with missing DICOM Rescale Intercept and Slope attributes #236
• Fix IPython detection routine #237
• Use Python 3.7 for JupyterLab #241
• Update gdown command and missing package #246
• Do not upgrade packages when packaging #247
• Drop Python 3.6 support #248

[MMelQin]

LGTM. Thanks

[gigony]

@KavinKrishnan

FYI, template.py is updated to use local MONAI App SDK module (it was removed by #199 before).

• https://github.com/Project-MONAI/monai-deploy-app-sdk/pull/250/files#diff-23233b22a8be7ec5f297f667c8333b94c4cfa941b6f39d5376ad6826bb819d53L15

[MMelQin]

The example app had been tested with numpy>=1.21.
Looks good to me.