Fix the conversion of lists to strings #269

Job	Run time
Coding Standards / Coding Standards (8.0)	30s
Static analysis / Static Code Analysis (8.0)	20s
Code Coverage / Code Coverage	15s
Dependency analysis / Dependency Analysis (8.0)	26s
Unit test / Supported Versions Matrix	4s
Lint root / Lint yaml & Composer (8.0)	14s
Unit test / Tests (7.4, locked)	13s
Unit test / Tests (7.4, lowest)	44s
Unit test / Tests (7.3, lowest)	26s
Unit test / Tests (8.0, highest)	31s
Unit test / Tests (7.3, locked)	14s
Unit test / Tests (8.0, lowest)	27s
Unit test / Tests (8.2, lowest)	24s
Unit test / Tests (7.3, highest)	37s
Unit test / Tests (8.1, highest)	30s
Unit test / Tests (8.4, lowest)	33s
Unit test / Tests (7.4, highest)	34s
Unit test / Tests (8.3, highest)	25s
Unit test / Tests (8.3, locked)	15s
Unit test / Tests (8.1, lowest)	22s
Unit test / Tests (8.3, lowest)	21s
Unit test / Tests (8.4, highest)	32s
Unit test / Tests (8.2, highest)	29s
Unit test / Tests (8.5, locked)	15s
Unit test / Tests (8.1, locked)	13s
Unit test / Tests (8.2, locked)	23s
Unit test / Tests (8.5, lowest)	21s
Unit test / Tests (8.0, locked)	16s
Unit test / Tests (8.5, highest)	28s
Unit test / Tests (8.4, locked)	13s
	11m 35s

Provide feedback