Use named-readtables #187

Job	Run time
ci-config	1s
report-warnings [lisp=abcl]	5m 23s
report-warnings [lisp=allegro]	4m 10s
tests [lisp=allegro]	3m 15s
report-warnings [lisp=ccl]	2m 35s
tests [lisp=ccl]	20m 15s
report-warnings [lisp=cmucl]	2m 29s
tests [lisp=cmucl]	2m 26s
report-warnings [lisp=ecl]	14m 11s
tests [lisp=ecl]	13m 56s
report-warnings [lisp=sbcl-bin]	1m 59s
tests [lisp=abcl]	20m 19s
tests [lisp=sbcl-bin]	6m 35s
	1h 37m 34s

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