Ksoup v0.2.1 forces to use minSdk version to at least 23 on Android

[mxkmn]

Describe the bug
A cumulative upgrade should not require a minSdk upgrade. It will force many applications to stay on the deprecated version of ksoup.

To Reproduce
Steps to reproduce the behavior:
Use Ksoup v0.2.1 in minSdk 21 android project.

Expected behavior
Use Ksoup v0.2.1 in all actual android projects, not with inflated Android version requirements.

Sample Code

> Task :app:chronus:processDebugMainManifest FAILED
...\app\chronus\src\main\AndroidManifest.xml Error:
	uses-sdk:minSdkVersion 21 cannot be smaller than version 23 declared in library [com.fleeksoft.io:io-android:0.0.2] ...\.gradle\caches\8.11\transforms\6a8142518b2a3c5ced6e7ef66eccd586\transformed\io-release\AndroidManifest.xml as the library might be using APIs not available in 21
	Suggestion: use a compatible library with a minSdk of at most 21,
		or increase this project's minSdk version to at least 23,
		or use tools:overrideLibrary="com.fleeksoft.io" to force usage (may lead to runtime failures)

Additional context
If current com.fleeksoft.io can't be used with minSdk 21, it should depends on something like com.fleeksoft.io-lite.

[itboy87]

@mxkmn I will update the minimum SDK to 21 starting from the upcoming version 0.2.2