build: Allow TS functions to be used before their definition

This is fine, TypeScript will check them correctly.  And it is very
useful for global functions, at least.  And we allow functions to be
used before their definitions in JavaScript files.

.eslintrc.json

@@ -72,8 +72,12 @@
             // https://typescript-eslint.io/rules/no-use-before-define
             // Note: you must disable the base rule as it can report incorrect errors
             "no-use-before-define": "off",
-            "@typescript-eslint/no-use-before-define": "error",
-
+            "@typescript-eslint/no-use-before-define": [
+              "error",
+              {
+                "functions": false
+              }
+            ],
             // as recommended by https://typescript-eslint.io/rules/no-unused-vars/
             "@typescript-eslint/no-unused-vars": [
               "error",