Move node minimum version to lowest that supports json import asserts without flag:

actions-expressions/package.json

@@ -37,7 +37,7 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "engines": {
-    "node": ">= 18"
+    "node": ">= 16.15"
   },
   "files": [
     "dist/**/*"

actions-languageserver/package.json

@@ -46,7 +46,7 @@
     "yaml": "^2.1.3"
   },
   "engines": {
-    "node": ">= 18"
+    "node": ">= 16.15"
   },
   "files": [
     "dist/**/*"

actions-languageservice/package.json

@@ -45,7 +45,7 @@
     "yaml": "^2.1.1"
   },
   "engines": {
-    "node": ">= 18"
+    "node": ">= 16.15"
   },
   "files": [
     "dist/**/*"

actions-workflow-parser/package.json

@@ -45,7 +45,7 @@
     "yaml": "^2.0.0-8"
   },
   "engines": {
-    "node": ">= 18"
+    "node": ">= 16.15"
   },
   "files": [
     "dist/**/*"