make HttpMethod not care about case

unirest/src/main/java/kong/unirest/HttpMethod.java

@@ -49,7 +49,7 @@ private HttpMethod(String name){
 	}
 
 	public static HttpMethod valueOf(String verb){
-		return REGISTRY.computeIfAbsent(verb, HttpMethod::new);
+		return REGISTRY.computeIfAbsent(String.valueOf(verb).toUpperCase(), HttpMethod::new);
 	}
 
 	public Set<HttpMethod> all(){

unirest/src/test/java/kong/unirest/HttpMethodTest.java

@@ -0,0 +1,47 @@
+/**
+ * The MIT License
+ *
+ * Copyright for portions of unirest-java are held by Kong Inc (c) 2013.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package kong.unirest;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class HttpMethodTest {
+
+    @Test
+    public void equalsTest() {
+        assertEquals(HttpMethod.valueOf("GET"), HttpMethod.valueOf("GET"));
+        assertEquals(HttpMethod.GET, HttpMethod.GET);
+        assertNotEquals(HttpMethod.valueOf("GET"), HttpMethod.valueOf("PUT"));
+        assertNotEquals(HttpMethod.GET, HttpMethod.PUT);
+    }
+
+
+    @Test
+    public void notCaseSensative() {
+        assertEquals(HttpMethod.valueOf("GET"), HttpMethod.valueOf("get"));
+    }
+}