fix file upload - consider metadata options by creating form data

.lintstagedrc.json

@@ -1,3 +1,6 @@
 {
-  "*.ts": ["tslint --project . --fix", "git add"]
+  "linters": {
+    "*.ts": ["tslint --project . --fix", "git add"]
+  },
+  "ignore": ["test/**/*.ts"]
 }

.vscode/settings.json

@@ -1,6 +1,7 @@
 {
-  "typescript.tsdk": "./node_modules/typescript/lib",
-  "editor.rulers": [
-    120
-  ]
-}
+    "typescript.tsdk": "./node_modules/typescript/lib",
+    "editor.rulers": [
+        120
+    ],
+    "editor.tabSize": 2,
+}

docs/_posts/2018-03-14-v4.0.1.md

@@ -0,0 +1,12 @@
+---
+layout: changelog
+---
+
+-  Fixes crash in projects where `"name"` or `"version"` were not defined in the `package.json` file (#478) - thanks @wilhelmklopp @clavin @aoberoi
+-  Fixes `IncomingWebhook.send()` to parse the response as text instead of JSON (#477) - thanks @aoberoi
+-  Allows `IncomingWebhook` to be initialized without defaults (#479) - thanks @aoberoi
+-  Allows `WebClient` to be initialized without a `token` in TypeScript (#482) - thanks @aoberoi
+-  Allows unspecificed arguments to be used with `WebClient` method aliases and `apiCall()` (#484) - thanks @clavin
+-  Exports method argument types as top level exports in the type declarations (#483) - thanks @aoberoi
+-  Fixes inaccurate property type for `as_user` in `ChatPostMessageArguments` (#475) - thanks @harveyr
+-  Improves the `OAuthAccessArguments` and `OAuthTokenArguments` types (#481) - thanks @aoberoi

docs/_reference/WebClient.md

@@ -8,15 +8,16 @@ A client for Slack's Web API
 This client provides an alias for each [Web API method](https://api.slack.com/methods). Each method is
 a convenience wrapper for calling the [WebClient#apiCall](WebClient#apiCall) method using the method name as the first parameter.
 
-**Kind**: static class of [<code>@slack/client</code>](#module_@slack/client)
-**Extends**: <code>EventEmitter</code>
+**Kind**: static class of [<code>@slack/client</code>](#module_@slack/client)  
+**Extends**: <code>EventEmitter</code>  
 **Properties**
 
 | Name | Type | Description |
 | --- | --- | --- |
 | [token] | <code>string</code> | Authentication and authorization token for accessing Slack Web API (usually begins with `xoxp`, `xoxb`, or `xoxa`) |
 | [slackApiUrl] | <code>string</code> | The base URL for reaching Slack's Web API. Consider changing this value for testing purposes. |
 
+
 * [.WebClient](#module_@slack/client.WebClient) ⇐ <code>EventEmitter</code>
     * [.apiCall(method, options)](#module_@slack/client.WebClient+apiCall) ⇒ [<code>Promise.&lt;WebAPICallResult&gt;</code>](#module_@slack/client.WebAPICallResult)
     * [.apiCall(method, options, callback)](#module_@slack/client.WebClient+apiCall)
@@ -27,7 +28,7 @@ a convenience wrapper for calling the [WebClient#apiCall](WebClient#apiCall) met
 ### webClient.apiCall(method, options) ⇒ [<code>Promise.&lt;WebAPICallResult&gt;</code>](#module_@slack/client.WebAPICallResult)
 Generic method for calling a Web API method
 
-**Kind**: instance method of [<code>WebClient</code>](#module_@slack/client.WebClient)
+**Kind**: instance method of [<code>WebClient</code>](#module_@slack/client.WebClient)  
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -37,22 +38,22 @@ Generic method for calling a Web API method
 <a name="module_@slack/client.WebClient+apiCall"></a>
 
 ### webClient.apiCall(method, options, callback)
-**Kind**: instance method of [<code>WebClient</code>](#module_@slack/client.WebClient)
+**Kind**: instance method of [<code>WebClient</code>](#module_@slack/client.WebClient)  
 
 | Param | Type |
 | --- | --- |
-| method | <code>string</code> |
-| options | [<code>WebAPICallOptions</code>](#module_@slack/client.WebAPICallOptions) |
-| callback | [<code>WebAPIResultCallback</code>](#module_@slack/client.WebAPIResultCallback) |
+| method | <code>string</code> | 
+| options | [<code>WebAPICallOptions</code>](#module_@slack/client.WebAPICallOptions) | 
+| callback | [<code>WebAPIResultCallback</code>](#module_@slack/client.WebAPIResultCallback) | 
 
 <a name="module_@slack/client.WebClient+apiCall"></a>
 
 ### webClient.apiCall(method, options, callback)
-**Kind**: instance method of [<code>WebClient</code>](#module_@slack/client.WebClient)
+**Kind**: instance method of [<code>WebClient</code>](#module_@slack/client.WebClient)  
 
 | Param | Type |
 | --- | --- |
-| method | <code>string</code> |
-| options | [<code>WebAPICallOptions</code>](#module_@slack/client.WebAPICallOptions) |
-| callback | [<code>WebAPIResultCallback</code>](#module_@slack/client.WebAPIResultCallback) |
+| method | <code>string</code> | 
+| options | [<code>WebAPICallOptions</code>](#module_@slack/client.WebAPICallOptions) | 
+| callback | [<code>WebAPIResultCallback</code>](#module_@slack/client.WebAPIResultCallback) |