chore(common): Preliminary update of min node version

This updates the minimum required node version to Node 20. The latest
version of Node 18 still contains the npm bug
(npm/cli#7072) whereas Node 20 got updated to
a npm version that contains a fix. Node 20 is known to work with our
current code, so this change updates to that as an intermediate step
before we investigate if we can update to Node 22 as discussed for
Keyman 18.

resources/build/minimum-versions.inc.sh

@@ -13,7 +13,7 @@ KEYMAN_MIN_TARGET_VERSION_UBUNTU=20.04        # Ubuntu 20.04 Focal
 KEYMAN_MIN_TARGET_VERSION_CHROME=95.0         # Final version that runs on Android 5.0
 
 # Dependency versions
-KEYMAN_MIN_VERSION_NODE_MAJOR=18
+KEYMAN_MIN_VERSION_NODE_MAJOR=20              # Latest Node 20 doesn't have the buggy npm (npm#7072)
 KEYMAN_MIN_VERSION_NPM=10.5.1                 # 10.5.0 has bug, discussed in #10350
 KEYMAN_MIN_VERSION_EMSCRIPTEN=3.1.44          # Warning: 3.1.45 is bad (#9529); newer versions work
 KEYMAN_MAX_VERSION_EMSCRIPTEN=3.1.58          # See #9529