feat: add sstdev, sstdevch, sstdevpn, sstdevwd to namespace

---
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: na
  - 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: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/stats/base/ndarray/lib/index.js

@@ -1260,6 +1260,42 @@ setReadOnly( ns, 'snanrange', require( '@stdlib/stats/base/ndarray/snanrange' )
 */
 setReadOnly( ns, 'srange', require( '@stdlib/stats/base/ndarray/srange' ) );
 
+/**
+* @name sstdev
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/base/ndarray/sstdev}
+*/
+setReadOnly( ns, 'sstdev', require( '@stdlib/stats/base/ndarray/sstdev' ) );
+
+/**
+* @name sstdevch
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/base/ndarray/sstdevch}
+*/
+setReadOnly( ns, 'sstdevch', require( '@stdlib/stats/base/ndarray/sstdevch' ) );
+
+/**
+* @name sstdevpn
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/base/ndarray/sstdevpn}
+*/
+setReadOnly( ns, 'sstdevpn', require( '@stdlib/stats/base/ndarray/sstdevpn' ) );
+
+/**
+* @name sstdevwd
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/base/ndarray/sstdevwd}
+*/
+setReadOnly( ns, 'sstdevwd', require( '@stdlib/stats/base/ndarray/sstdevwd' ) );
+
 /**
 * @name sztest
 * @memberof ns