chore: update version to 1.8.2 and add entry to changelog #231

Job	Run time
Lint and Format Dart Code	24s
Test example (ios, macos)	1m 1s
Test example (macos, macos)	58s
Test example on Android API level 21 ()	45s
Build example (android, ubuntu)	22s
Test example (linux, ubuntu)	26s
Test example on Android API level 29 ()	24s
Test example (windows, windows)	1m 55s
Build example (ios, macos)	55s
Build example (macos, macos)	1m 15s
Build example (linux, ubuntu)	43s
Build example (windows, windows)	2m 56s
	12m 4s

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