component/nodejs: add version 12.18.3

This is current LTS

component/nodejs/buildout.cfg

@@ -14,6 +14,12 @@ parts =
 [nodejs]
 <= nodejs-8.9.4
 
+[nodejs-12.18.3]
+<= nodejs-base
+openssl_location = ${openssl:location}
+version = v12.18.3
+md5sum = 28bf6a4d98b238403fa58a0805f4a979
+
 [nodejs-10.19.0]
 <= nodejs-base
 openssl_location = ${openssl:location}