add the 5.20.0 release epigraph

(cherry picked from commit 7684c8f0e22a8866fd1448586cdf1fdcb2c9bbc8)
Add epigraph for Perl 5.21.0.

(cherry picked from commit 84d7a06cd8fcbca3f64facfc9e02feaaeed0deb9)
epigraphs: add the v5.20.0-RC1 epigraph

(cherry picked from commit f17f1150d314e25aa30040c666f2a8fadbb298c1)
Add Epipgraph for 5.21.1

(cherry picked from commit e1bdea9ec27b23189e3456964a31e57132ab8cda)
Fix typo... nothing to see here

(cherry picked from commit c5aea1955a29bc7e8ef53eb3dd271fdacff597f3)
Epigraph for 5.21.2

(cherry picked from commit 66f3ab9ef25574940c3bf19e111886105f52d116)
Epigraph for 5.21.3

(cherry picked from commit 46a97ad77cd8b57de2b0ec11fe6248552fc7aa4f)
Add epigraph for 5.20.1-RC1

(cherry picked from commit e1ded6adc0dc6f48cbbdae3c5aa65058af8580dd)