Split build command, update README API docs

README.md

@@ -223,7 +223,7 @@ Parser options
 
 Text encoding of the input GFF3. default 'utf8'
 
-Type: [string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String)
+Type: BufferEncoding
 
 #### parseFeatures
 
@@ -281,9 +281,9 @@ parsed items.
 #### Parameters
 
 - `str` **[string](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/String)** GFF3 string
-- `inputOptions` **[ParseOptions](#parseoptions)** Parsing options (optional, default `{}`)
+- `inputOptions` **({encoding: BufferEncoding?, bufferSize: [number](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number)?} | [undefined](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/undefined))?** Parsing options
 
-Returns **[Array](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array)\<GFF3Item>** array of parsed features, directives, comments and/or sequences
+Returns **[Array](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array)<(GFF3Feature | GFF3Sequence)>** array of parsed features, directives, comments and/or sequences
 
 ### formatSync
 

package.json

@@ -21,15 +21,17 @@
   "scripts": {
     "test": "jest",
     "clean": "rimraf dist esm",
-    "coverage": "npm test -- --coverage",
+    "coverage": "npm-run-all \"test -- --coverage\"",
     "lint": "eslint src test",
     "docs": "npm-run-all docs:*",
     "docs:api": "documentation readme src/api.ts --section=API  --shallow",
     "docs:util": "documentation readme src/util.ts --section=util  --shallow",
     "docs:format": "prettier --write README.md",
-    "prebuild": "npm run clean",
-    "build": "tsc --target es2018 --outDir esm && tsc --target es5 --outDir dist",
-    "prepublishOnly": "npm test && npm run build",
+    "prebuild": "npm-run-all clean",
+    "build:esm": "tsc --target es2018 --outDir esm",
+    "build:es5": "tsc --target es5 --outDir dist",
+    "build": "npm-run-all --parallel build:*",
+    "prepublishOnly": "npm-run-all test build",
     "postpublish": "git push origin master --follow-tags"
   },
   "keywords": [