chore: fix linting issues

---
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: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: missing_dependencies
  - 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
---

---
type: pre_push_report
description: Results of running various checks prior to pushing changes.
report:
  - task: run_javascript_examples
    status: na
  - task: run_c_examples
    status: na
  - task: run_cpp_examples
    status: na
  - task: run_javascript_readme_examples
    status: na
  - task: run_c_benchmarks
    status: na
  - task: run_cpp_benchmarks
    status: na
  - task: run_fortran_benchmarks
    status: na
  - task: run_javascript_benchmarks
    status: na
  - task: run_julia_benchmarks
    status: na
  - task: run_python_benchmarks
    status: na
  - task: run_r_benchmarks
    status: na
  - task: run_javascript_tests
    status: na
---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/hyp2f1/test/fixtures/python/runner.py

@@ -103,7 +103,7 @@ def gen(a, b, c, x, name):
     filepath = os.path.join(DIR, name)
 
     # Write the data to the output filepath as JSON:
-    with open(filepath, "w") as outfile:
+    with open(filepath, "w", encoding="utf-8") as outfile:
         json.dump(data, outfile)
 
 def gen_outliers(name):
@@ -137,7 +137,7 @@ def gen_outliers(name):
     filepath = os.path.join(DIR, name)
 
     # Write the data to the output filepath as JSON:
-    with open(filepath, "w") as outfile:
+    with open(filepath, "w", encoding="utf-8") as outfile:
         json.dump(data, outfile)