Update changelog and demote package version to 0.2.0 #765

Job	Run time
Get R version	1s
Links / Validate Links	6s
Check / (4.1)	4m 9s
Check / (4.2)	4m 32s
Check / (4.3)	2m 32s
Check / (devel)	4m 42s
Documentation	0s
Render README	0s
Validation	0s
Man Pages / Roxygen	4m 37s
Lint / Lint	4m 55s
Code Coverage / Test Coverage	5m 15s
Spelling / Spellcheck	4m 41s
Check Templates / Verify	4m 34s
Code Style / Code Style	4m 50s
Code Coverage / Generate badge for coverage	10s
	45m 4s

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