chore: added changes in README.md file and minor changes

Author: 0PrashantYadav0

lib/node_modules/@stdlib/stats/base/dists/gamma/skewness/README.md

@@ -142,6 +142,101 @@ for ( i = 0; i < 10; i++ ) {
 
 <!-- /.examples -->
 
+<!-- C interface documentation. -->
+
+* * *
+
+<section class="c">
+
+## C APIs
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- C usage documentation. -->
+
+<section class="usage">
+
+### Usage
+
+```c
+#include "stdlib/stats/base/dists/gamma/skewness.h"
+```
+
+#### stdlib_base_dists_gamma_skewness( alpha, beta )
+
+Returns the skewness of a gamma distribution.
+
+```c
+double out = stdlib_base_dists_gamma_skewness( 1.0, 1.0 );
+// returns 1.0
+```
+
+The function accepts the following arguments:
+
+-   **alpha**: `[in] double` shape parameter.
+-   **beta**: `[in] double` rate parameter.
+
+```c
+double stdlib_base_dists_gamma_skewness( const double alpha, const double beta );
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- C API usage examples. -->
+
+<section class="examples">
+
+### Examples
+
+```c
+#include "stdlib/stats/base/dists/gamma/skewness.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static double random_uniform( const double min, const double max ) {
+    double v = (double)rand() / ( (double)RAND_MAX + 1.0 );
+    return min + ( v*(max-min) );
+}
+
+int main( void ) {
+    double alpha;
+    double beta;
+    double y;
+    int i;
+
+    for ( i = 0; i < 25; i++ ) {
+       alpha = random_uniform( 0.0, 20.0 );
+       beta = random_uniform( 0.0, 20.0 );
+       y = stdlib_base_dists_gamma_skewness( alpha, beta );
+       printf( "α: %lf, β: %lf, skew(X;α,β): %lf\n", alpha, beta, y );
+    }
+}
+```
+
+</section>
+
+<!-- /.examples -->
+
+</section>
+
+<!-- /.c -->
+
 <!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
 
 <section class="references">

lib/node_modules/@stdlib/stats/base/dists/gamma/skewness/benchmark/c/benchmark.c

@@ -17,6 +17,7 @@
 */
 
 #include "stdlib/stats/base/dists/gamma/skewness.h"
+#include "stdlib/constants/float64/eps.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
@@ -100,8 +101,8 @@ static double benchmark( void ) {
 	int i;
 
 	for ( i = 0; i < 100; i++ ) {
-		alpha[ i ] = random_uniform( 0.0, 20.0 );
-		beta[ i ] = random_uniform( 0.0, 20.0 );
+		alpha[ i ] = random_uniform( 0.0, 20.0 ) + STDLIB_CONSTANT_FLOAT64_EPS;
+		beta[ i ] = random_uniform( 0.0, 20.0 ) + STDLIB_CONSTANT_FLOAT64_EPS;
 	}
 
 	t = tic();

lib/node_modules/@stdlib/stats/base/dists/gamma/skewness/lib/native.js

@@ -22,9 +22,13 @@
 
 var addon = require( './../src/addon.node' );
 
+
+// MAIN //
+
 /**
 * Returns the skewness of a gamma distribution.
 *
+* @private
 * @param {PositiveNumber} alpha - shape parameter
 * @param {PositiveNumber} beta - rate parameter
 * @returns {PositiveNumber} skewness

lib/node_modules/@stdlib/stats/base/dists/gamma/skewness/manifest.json

@@ -56,7 +56,8 @@
       "libpath": [],
       "dependencies": [
         "@stdlib/math/base/assert/is-nan",
-        "@stdlib/math/base/special/sqrt"
+        "@stdlib/math/base/special/sqrt",
+        "@stdlib/constants/float64/eps"
       ]
     },
     {