improve data on author_handle.json files

Updated URLs, Email addresses, GitHub handles,
Mastodon handles, and locations of various IOCCC winning authors.

author/John_Tromp.json

@@ -7,12 +7,12 @@
     "location_code" : "US",
     "location_name" : "United States of America",
     "email" : "john.tromp@gmail.com",
-    "url" : "http://tromp.github.io/",
+    "url" : "https://tromp.github.io",
     "alt_url" : null,
     "deprecated_twitter_handle" : null,
     "mastodon" : null,
     "mastodon_url" : null,
-    "github" : null,
+    "github" : "@tromp",
     "affiliation" : null,
     "winning_entry_set" : [
 	{ "winner_id" : "1989_tromp" },