migrate legecy options in tests

Author: cometkim

jscomp/build_tests/cycle1/rescript.json

@@ -7,7 +7,7 @@
     "subdirs": true
   },
   "package-specs": {
-    "module": "es6",
+    "module": "esmodule",
     "in-source": true
   },
   "suffix": ".bs.js"

jscomp/build_tests/in_source/rescript.json

@@ -7,7 +7,7 @@
       "in-source": true
     },
     {
-      "module": "es6",
+      "module": "esmodule",
       "in-source": true
     }
   ]

jscomp/gentype_tests/typescript-react-example/rescript.json

@@ -1,7 +1,7 @@
 {
   "gentypeconfig": {
     "language": "typescript",
-    "module": "es6",
+    "module": "esmodule",
     "importPath": "relative",
     "shims": {
       "Js": "Js",
@@ -26,7 +26,7 @@
   ],
   "uncurried": false,
   "package-specs": {
-    "module": "es6",
+    "module": "esmodule",
     "in-source": true
   },
   "suffix": ".res.js"

packages/test/bsconfig.json renamed to packages/test/rescript.json

@@ -8,7 +8,7 @@
   ],
   "package-specs": [
     {
-      "module": "es6",
+      "module": "esmodule",
       "in-source": true
     }
   ],