feat: add support for non-string data types

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/assert/is-index-data-type/lib/main.js

@@ -24,13 +24,16 @@ var contains = require( '@stdlib/array/base/assert/contains' ).factory;
 var dtypes = require( '@stdlib/ndarray/dtypes' );
 
 
+// VARIABLES //
+
+var isDataType = contains( dtypes( 'index' ) );
+
+
 // MAIN //
 
 /**
 * Tests whether an input value is a supported ndarray index data type.
 *
-* @name isIndexDataType
-* @type {Function}
 * @param {*} v - value to test
 * @returns {boolean} boolean indicating whether an input value is a supported ndarray index data type
 *
@@ -71,7 +74,9 @@ var dtypes = require( '@stdlib/ndarray/dtypes' );
 * bool = isIndexDataType( 'foo' );
 * // returns false
 */
-var isIndexDataType = contains( dtypes( 'index' ) );
+function isIndexDataType( v ) {
+	return isDataType( String( v ) );
+}
 
 
 // EXPORTS //

lib/node_modules/@stdlib/ndarray/base/assert/is-index-data-type/test/test.js

@@ -21,6 +21,7 @@
 // MODULES //
 
 var tape = require( 'tape' );
+var DataType = require( '@stdlib/ndarray/dtype-ctor' );
 var isIndexDataType = require( './../lib' );
 
 
@@ -41,7 +42,12 @@ tape( 'the function returns `true` if provided a supported ndarray index data ty
 		'bool',
 		'int32',
 		'uint8',
-		'generic'
+		'generic',
+
+		new DataType( 'bool' ),
+		new DataType( 'int32' ),
+		new DataType( 'uint8' ),
+		new DataType( 'generic' )
 	];
 	for ( i = 0; i < values.length; i++ ) {
 		bool = isIndexDataType( values[ i ] );
@@ -68,6 +74,8 @@ tape( 'the function returns `false` if not provided a supported ndarray index da
 		'uint32',
 		'uint8c',
 
+		new DataType( 'binary' ),
+
 		// Unsupported dtypes:
 		'float',
 		'int',