add missing props to CONTRIBUTORS.md

Note that some of the references below are not the only contributions (commits, PR review, helpful issue input, etc.) from these folks, but merely the first ones I encountered while reviewing items committed to `trunk` since the initial branch commit.

@westonruter via  WordPress#51
@ntwb via WordPress#73
@juricav via WordPress#113
@Sandstromer via WordPress#69
@jasmussen via WordPress#74
@melchoyce via WordPress#16
@Riyadh1734 via WordPress#182
@desrosj via WordPress#223
@beafialho via WordPress#172
@clucasrowlands via WordPress#171
@Otto42 via WordPress#28
@luminuu via WordPress#107
@felixarntz via WordPress#240

CONTRIBUTORS.md

@@ -5,32 +5,45 @@
 | @abmsourav | @sourav926 |
 | @aristath | @aristath |
 | @audrasjb | @audrasjb |
+| @beafialho |  |
 | @bgardner | @bgardner |
 | @briceduclos | @briceduclos |
 | @carolinan | @poena |
+| @clucasrowlands |  |
 | @colorful-tones | @colorful-tones |
+| @desrosj |  |
 | @dgwyer | @dgwyer |
 | @dimadin | @dimadin |
 | @gregrickaby | @gregrickaby |
 | @ellenbauer | @ellenbauer |
+| @felixarntz |  |
+| @jasmussen |  |
 | @jffng | @jffng |
+| @juricav |  |
 | @iwangdu | @ |
 | @kafleg | @kafleg |
 | @karmatosed | @karmatosed |
 | @kraftbj | @kraftbj |
 | @kjellr | @kjellr |
 | @littlebigthing | @littlebigthing |
+| @luminuu |  |
 | @maggiecabrera | @onemaggie |
+| @melchoyce |  |
 | @mtias | @matveb |
 | @mburridge | @mburridge |
 | @mtoensing | @mtoensing |
 | @nickcernis | @nickcernis |
 | @nielslange | @nielslange |
+| @ntwb |  |
+| @otto42 |  |
 | @pattonwebz | @williampatton |
 | @pbking | @pbking |
 | @ribaricplusplus | @ribaricplusplus |
 | @richtabor | @onemaggie |
+| @riyadh1734 |  |
+| @sandstromer |  |
 | @scruffian | @scruffian |
 | @soean | @soean |
 | @tebenachi | @utz119 |
+| @westonruter |  |
 | @youknowriad | @youknowriad |