* fix/Avoid package.json import; (#4041)

* Added auto-generated config module `env/data.js` for importing package environment vars without importing the whole `package.json`;
Refactored `http.js` to use `env/data.js` instead of package.json;

* Added `env/data.js`;
Added `env/README.md`;

* Feat/export package version constant (#4065)

* Added auto-generated config module `env/data.js` for importing package environment vars without importing the whole `package.json`;
Refactored `http.js` to use `env/data.js` instead of package.json;

* Added `env/data.js`;
Added `env/README.md`;

* Export package version constant;

* Fixed cancelToken leakage; Added AbortController support; (#3305)

* Fixed cancelToken leakage;
Added AbortController support;

* Fixed typings;

* Documented `signal` option;

* Added processing of early cancellation using AbortController without sending a request;
Co-authored-by: NJay <jasonsaayman@gmail.com>

* Updating CI to run on release branches

* Fixed default transitional config for custom Axios instance; (#4052)

Refactored `/core/mergeConfig`;
Co-authored-by: NJay <jasonsaayman@gmail.com>

* Prepping v0.22.0 for release

* Updated date
Co-authored-by: NDmitriy Mozgovoy <robotshara@gmail.com>