Codegen router files in strict mode, update minimum version

Minimum HHVM version is updated as the new hack-codegen requires a newer
hhvm, for coeffects support.

Author: fredemmott

.github/workflows/build-and-test.yml

@@ -13,7 +13,7 @@ jobs:
       matrix:
         os: [ ubuntu ]
         hhvm:
-          - '4.62'
+          - '4.93'
           - latest
           - nightly
     runs-on: ${{matrix.os}}-latest

composer.json

@@ -4,10 +4,10 @@
     "keywords": ["hack", "router", "routing", "hhvm"],
     "homepage": "https://github.com/hhvm/hack-router-codegen",
     "require": {
-        "hhvm": "^4.25",
+        "hhvm": "^4.93",
         "facebook/hack-router": "^0.19",
         "facebook/hack-http-request-response-interfaces": "^0.2|^0.3",
-        "facebook/hack-codegen": "^4.1.0",
+        "facebook/hack-codegen": "^4.5.0",
         "facebook/definition-finder": "^2.7",
         "hhvm/type-assert": "^3.0|^4.0"
     },

src/RouterCLILookupCodegenBuilder.hack

@@ -70,7 +70,7 @@ final class RouterCLILookupCodegenBuilder {
     $file = $this->cg->codegenFile($path)
       ->setDoClobber($this->discardChanges)
       ->setShebangLine('#!/usr/bin/env hhvm')
-      ->setFileType(CodegenFileType::HACK_PARTIAL)
+      ->setFileType(CodegenFileType::HACK_STRICT)
       ->setGeneratedFrom($this->generatedFrom)
       ->addClass($this->getCodegenClass($router_classname, $utility_classname))
       ->addFunction(