feat: add tree-shakeable ESM build (minor)

index.ts

@@ -15,5 +15,7 @@ export { ConfigurationOptions, AdditionalOptions, BasePath } from "./client/clie
 export { Fireblocks } from "./client/client"
 export { FireblocksResponse } from "./response/fireblocksResponse"
 export { FireblocksError } from "./error/fireblocksError"
+export { AxiosManager } from "./network/axiosManager"
+export { Configuration, ConfigurationParameters } from "./configuration"
 export * from "./api";
 export * from "./models";

package.json

@@ -17,9 +17,14 @@
   "license": "MIT License",
   "main": "./dist/index.js",
   "typings": "./dist/index.d.ts",
+  "module": "./dist/esm/index.js",
+  "sideEffects": false,
+  "files": [
+    "dist"
+  ],
   "scripts": {
-    "build": "tsc && npm run copy:package",
-    "copy:package": "cp package.json dist/",
+    "build": "tsc && tsc -p tsconfig.esm.json && npm run copy:package",
+    "copy:package": "cp package.json dist/ && cp package.json dist/esm/",
     "prepare": "npm run build",
     "postversion": "if [ \"$SKIP_POSTVERSION\" != \"true\" ]; then git push && git push --tags; fi",
     "test": "jest --coverage --passWithNoTests --runInBand --detectOpenHandles --forceExit",

tsconfig.esm.json

@@ -0,0 +1,14 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "esnext",
+    "moduleResolution": "node",
+    "outDir": "dist/esm",
+    "declaration": false
+  },
+  "exclude": [
+    "dist",
+    "node_modules",
+    "tests"
+  ]
+}