test: add 8d tests

---
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: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
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  - task: lint_python
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  - 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: headlessNode

lib/node_modules/@stdlib/ndarray/base/some-by/test/test.6d.js

@@ -721,7 +721,7 @@ tape( 'the function tests whether at `n` elements in a 6-dimensional ndarray pas
 	dt = 'complex128';
 	ord = 'row-major';
 	sh = [ 1, 2, 1, 2, 1, 2 ];
-	st = [ -4, -4, -4, -2, -2, -1 ];
+	st = [ -8, -4, -4, -2, -2, -1 ];
 	o = strides2offset( sh, st );
 
 	xbuf = zeros( numel( sh )*2, 'float64' );

lib/node_modules/@stdlib/ndarray/base/some-by/test/test.7d.js

@@ -760,7 +760,7 @@ tape( 'the function tests whether at `n` elements in a 7-dimensional ndarray pas
 	dt = 'complex128';
 	ord = 'row-major';
 	sh = [ 1, 1, 2, 1, 2, 1, 2 ];
-	st = [ -4, -4, -4, -4, -2, -2, -1 ];
+	st = [ -8, -8, -4, -4, -2, -2, -1 ];
 	o = strides2offset( sh, st );
 
 	xbuf = zeros( numel( sh )*2, 'float64' );