chore: update list of Node.js versions

Author: kgryte

tools/make/common.mk

@@ -28,7 +28,7 @@ endif
 # GENERAL VARIABLES #
 
 # Define supported Node.js versions:
-NODE_VERSIONS ?= '0.10 0.12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 node'
+NODE_VERSIONS ?= '0.10 0.12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 node'
 
 # Define a license SPDX identifier whitelist:
 LICENSES_WHITELIST ?= 'Apache-2.0,Artistic-2.0,BSD-2-Clause,BSD-3-Clause,BSL-1.0,CC0-1.0,ISC,MIT,MPL-2.0,Unlicense,WTFPL'