feat: add gdiff and dcartesianSquare 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
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    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
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    status: na
  - task: lint_c_tests_fixtures
    status: na
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  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/lib/index.js

@@ -162,6 +162,15 @@ setReadOnly( ns, 'dapxsumpw', require( '@stdlib/blas/ext/base/dapxsumpw' ) );
 */
 setReadOnly( ns, 'dasumpw', require( '@stdlib/blas/ext/base/dasumpw' ) );
 
+/**
+* @name dcartesianSquare
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/blas/ext/base/dcartesian-square}
+*/
+setReadOnly( ns, 'dcartesianSquare', require( '@stdlib/blas/ext/base/dcartesian-square' ) );
+
 /**
 * @name dcircshift
 * @memberof ns
@@ -792,6 +801,15 @@ setReadOnly( ns, 'gcusumors', require( '@stdlib/blas/ext/base/gcusumors' ) );
 */
 setReadOnly( ns, 'gcusumpw', require( '@stdlib/blas/ext/base/gcusumpw' ) );
 
+/**
+* @name gdiff
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/blas/ext/base/gdiff}
+*/
+setReadOnly( ns, 'gdiff', require( '@stdlib/blas/ext/base/gdiff' ) );
+
 /**
 * @name gfill
 * @memberof ns