Added support for multiple request configurations. (#54)

This allows multiple requests to hit the same verb+path combination.
This was previously impossible, to address it, it's now possible to pass
an array of request settings as the body of a request each request will
be added to the request list individually.

Example:
```
GET /some/path:
  - alias: first
    headers:
      request: first
  - alias: second
    headers:
      request: second
```

src/__tests__/config.spec.js

@@ -157,4 +157,20 @@ describe('Config', () => {
         let config = new Config(doc);
         expect(config.REQUESTS[0].HEADERS.hello).toBe(1);
     });
+
+    it(`should allow different settings for the same request`, () => {
+        const doc = yaml.safeLoad(`
+      host: https://example.com
+      GET /1:
+        - alias: req1
+          headers:
+            request: 1
+        - alias: req2
+          headers:
+            request: 2
+    `);
+
+        let config = new Config(doc);
+        expect(config.REQUESTS.length).toBe(2);
+    });
 });

src/config.js

@@ -52,9 +52,20 @@ class Config {
     }
 
     loadRequests(host, settings) {
-        let requests = Object.entries(host)
+        Object.entries(host)
             .filter(([key]) => requestRegex.test(key))
-            .map(([key, rDefinition]) => {
+            .forEach(([key, rDefinition]) => {
+                if (Array.isArray(rDefinition)) {
+                    rDefinition.forEach(req =>
+                        this.addRequest(key, req, settings)
+                    );
+                } else {
+                    this.addRequest(key, rDefinition, settings);
+                }
+            });
+    }
+
+    addRequest(key, rDefinition, settings) {
         let requestDefinitionIsString = typeof rDefinition === 'string';
         let originalRequest = requestDefinitionIsString
             ? { ALIAS: rDefinition }
@@ -72,10 +83,7 @@ class Config {
 
         let defaults = UpperCaseKeys(settings.DEFAULTS);
 
-                return deepMerge(defaults, request);
+        this.REQUESTS.push(deepMerge(defaults, request));
-            });
-
-        this.REQUESTS = this.REQUESTS.concat(requests);
     }
 
     loadConfig(host) {