fix: transpile process to fix module import error

Author: sanjibansg

package.json

@@ -9,7 +9,7 @@
     "build": "npm run clean && npm run make-dist && npm run transpile",
     "make-dist": "mkdirp dist",
     "clean-proto": "rimraf src/generated && mkdirp src/generated",
-    "proto": "pbjs --target static-module --path substrait-spec/proto -o src/generated/definitions.js substrait/plan.proto",
+    "proto": "pbjs --target static-module -w es6 --path substrait-spec/proto -o src/generated/definitions.js substrait/plan.proto",
     "transpile": "tsc",
     "transpileProto": "pbts -o src/generated/definitions.d.ts src/generated/definitions.js",
     "prepare": "npm run clean-proto && npm run proto && npm run transpileProto",

src/index.ts

@@ -1,3 +1,4 @@
 export * from "./parser";
 export * as proto from "./generated/definitions";
 export * from "./cli"
+export * from "./graph"

tsconfig.json

@@ -11,7 +11,7 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "ES6",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */
@@ -25,7 +25,7 @@
     // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
 
     /* Modules */
-    "module": "ESNext",                                /* Specify what module code is generated. */
+    "module": "ES6",                                /* Specify what module code is generated. */
     "rootDir": "./src",                                  /* Specify the root folder within your source files. */
     "moduleResolution": "Node",                     /* Specify how TypeScript looks up a file from a given module specifier. */
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */