Bump version to 3.3.0 (#437)

* Update changelog for v3.3.0

* Bump version to 3.3.0

Author: tompng

CHANGES.md

@@ -1,5 +1,27 @@
 # CHANGES
 
+## 3.3.0
+
+* Allow calling to_d without arguments [GH-421]
+
+  **@fsateler**
+
+* Calculate BigMath.sin and cos in relative precision [GH-422]
+
+  **@tompng**
+
+* Add support for tangent function [GH-231]
+
+  **@rhannequin**
+
+* BigMath methods accepts numeric as an argument [GH-415]
+
+  **@tompng**
+
+* Round result of sqrt and BigMath methods [GH-427]
+
+  **@tompng**
+
 ## 3.2.3
 
 * Allow BigDecimal accept Float without precision [GH-314]

ext/bigdecimal/bigdecimal.c

@@ -31,7 +31,7 @@
 #include "bits.h"
 #include "static_assert.h"
 
-#define BIGDECIMAL_VERSION "3.2.3"
+#define BIGDECIMAL_VERSION "3.3.0"
 
 /* #define ENABLE_NUMERIC_STRING */