Fixed bug #4727 : toFormData Blob issue on node>v17; (#4728)

* Fixed bug #4727;
Added node 18.x to the CI;
Added hotfix for `ERR_OSSL_EVP_UNSUPPORTED` issue with karma running on node >=17.x;
Added `cross-env` to allow running build and test scripts on Windows platforms;

* Added conditional setting of `--openssl-legacy-provider` option for node versions >=17.x;

* Refactored ssl-hotfix & test script;

* Fixed and refactored default max body length test due to ECONNRESET failure;

* Added test for converting the data uri to a Blob;
Fixed bug with parsing mime type for Blob;

Co-authored-by: Jay <jasonsaayman@gmail.com>

package.json

@@ -5,10 +5,10 @@
   "main": "index.js",
   "types": "index.d.ts",
   "scripts": {
-    "test": "grunt test && dtslint",
+    "test": "node bin/ssl_hotfix.js grunt test && node bin/ssl_hotfix.js dtslint",
     "start": "node ./sandbox/server.js",
     "preversion": "grunt version && npm test",
-    "build": "NODE_ENV=production grunt build",
+    "build": "cross-env NODE_ENV=production grunt build",
     "examples": "node ./examples/server.js",
     "coveralls": "cat coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
     "fix": "eslint --fix lib/**/*.js"
@@ -39,6 +39,7 @@
     "abortcontroller-polyfill": "^1.7.3",
     "body-parser": "^1.20.0",
     "coveralls": "^3.1.1",
+    "cross-env": "^7.0.3",
     "dtslint": "^4.2.1",
     "es6-promise": "^4.2.8",
     "express": "^4.18.1",