feat: update namespace TypeScript declarations

PR-URL: #2351

Signed-off-by: stdlib-bot <82920195+stdlib-bot@users.noreply.github.com>
Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: stdlib-bot

lib/node_modules/@stdlib/blas/base/assert/docs/types/index.d.ts

@@ -21,15 +21,66 @@
 /* eslint-disable max-lines */
 
 import isLayout = require( '@stdlib/blas/base/assert/is-layout' );
+import isMatrixTriangle = require( '@stdlib/blas/base/assert/is-matrix-triangle' );
+import isTransposeOperation = require( '@stdlib/blas/base/assert/is-transpose-operation' );
 
 /**
 * Interface describing the `assert` namespace.
 */
 interface Namespace {
 	/**
-	* TODO
+	* Tests whether an input value is a BLAS memory layout.
+	*
+	* @param v - value to test
+	* @returns boolean indicating whether an input value is a memory layout
+	*
+	* @example
+	* var bool = ns.isLayout( 'row-major' );
+	* // returns true
+	*
+	* bool = ns.isLayout( 'column-major' );
+	* // returns true
+	*
+	* bool = ns.isLayout( 'foo' );
+	* // returns false
 	*/
 	isLayout: typeof isLayout;
+
+	/**
+	* Tests whether an input value is a BLAS matrix triangle.
+	*
+	* @param v - value to test
+	* @returns boolean indicating whether an input value is a matrix triangle
+	*
+	* @example
+	* var bool = ns.isMatrixTriangle( 'lower' );
+	* // returns true
+	*
+	* bool = ns.isMatrixTriangle( 'upper' );
+	* // returns true
+	*
+	* bool = ns.isMatrixTriangle( 'foo' );
+	* // returns false
+	*/
+	isMatrixTriangle: typeof isMatrixTriangle;
+
+	/**
+	* Tests whether an input value is a BLAS transpose operation.
+	*
+	* @param v - value to test
+	* @returns boolean indicating whether an input value is a transpose operation
+	*
+	* @example
+	* var bool = ns.isTransposeOperation( 'transpose' );
+	* // returns true
+	*
+	* bool = ns.isTransposeOperation( 'conjugate-transpose' );
+	* // returns true
+	*
+	* bool = ns.isTransposeOperation( 'foo' );
+	* // returns false
+	*/
+	isTransposeOperation: typeof isTransposeOperation;
 }
 
 /**