Bump emscripten's internal node dependency to from v16 to v20

ChangeLog.md

@@ -23,6 +23,8 @@ See docs/process.md for more on how version tagging works.
 
 4.0.0 - 01/14/25
 ----------------
+- The mimimum version of node required to run emscripten was bumped from v16.20
+  to v20.18.  This matches the version of node that is shipped in emsdk.
 - Emscripten version was bumped to 4.0.0. Happy new year, happy new major
   version!  While version has a few interesting changes, there is nothing huge
   that makes it different from any other release. (#19053)

test/test_sanity.py

@@ -286,8 +286,9 @@ def test_node(self):
     for version, succeed in (('v0.8.0', False),
                              ('v4.1.0', False),
                              ('v10.18.0', False),
-                             ('v16.20.0', True),
-                             ('v16.20.1-pre', True),
+                             ('v16.20.0', False),
+                             ('v20.18.0', True),
+                             ('v20.18.1-pre', True),
                              ('cheez', False)):
       print(version, succeed)
       delete_file(SANITY_FILE)

tools/shared.py

@@ -57,9 +57,9 @@
 # Minimum node version required to run the emscripten compiler.  This is
 # distinct from the minimum version required to execute the generated code
 # (settings.MIN_NODE_VERSION).
-# This version currently matches the node version that we ship with emsdk
-# which means that we can say for sure that this version is well supported.
-MINIMUM_NODE_VERSION = (16, 20, 0)
+# This version matches the node version that we ship with emsdk which means
+# that we know it has good test coverage.
+MINIMUM_NODE_VERSION = (20, 18, 0)
 EXPECTED_LLVM_VERSION = 20
 
 # These get set by setup_temp_dirs