Add TruffleRuby 20.0.0

README.md

@@ -18,7 +18,7 @@ This action currently supports these versions of MRI, JRuby and TruffleRuby:
 | ----------- | -------- |
 | Ruby | 2.2, 2.3.0 - 2.3.8, 2.4.0 - 2.4.9, 2.5.0 - 2.5.7, 2.6.0 - 2.6.5, 2.7.0, head |
 | JRuby | 9.2.9.0, head |
-| TruffleRuby | 19.3.0, 19.3.1, head |
+| TruffleRuby | 19.3.0, 19.3.1, 20.0.0, head |
 | Rubinius | 4.14 |
 
 Note that Ruby ≤ 2.3 and the OpenSSL version it needs (1.0.2) are both end-of-life,

dist/index.js

@@ -1396,6 +1396,7 @@ function getVersions(platform) {
     ],
     "truffleruby": [
       "19.3.0", "19.3.1",
+      "20.0.0",
       "head"
     ]
   }

ruby-builder-versions.js

@@ -15,6 +15,7 @@ export function getVersions(platform) {
     ],
     "truffleruby": [
       "19.3.0", "19.3.1",
+      "20.0.0",
       "head"
     ]
   }