feat(pip_requirements): detect requirements files with underscores (renovatebot#41911)

Author: felipecrs

lib/modules/manager/pip_requirements/index.spec.ts

@@ -7,8 +7,16 @@ describe('modules/manager/pip_requirements/index', () => {
 
     expect(matchRegexOrGlobList('requirements.txt', patterns)).toBe(true);
     expect(matchRegexOrGlobList('requirements-dev.txt', patterns)).toBe(true);
+    expect(matchRegexOrGlobList('requirements_test.txt', patterns)).toBe(true);
+    expect(matchRegexOrGlobList('requirements_test_all.txt', patterns)).toBe(
+      true,
+    );
     expect(matchRegexOrGlobList('requirements.dev.txt', patterns)).toBe(true);
     expect(matchRegexOrGlobList('requirements-dev.pip', patterns)).toBe(true);
+    expect(matchRegexOrGlobList('requirements_test.pip', patterns)).toBe(true);
+    expect(matchRegexOrGlobList('requirements_test_all.pip', patterns)).toBe(
+      true,
+    );
     expect(matchRegexOrGlobList('requirements.dev.pip', patterns)).toBe(true);
   });
 });

lib/modules/manager/pip_requirements/index.ts

@@ -11,7 +11,7 @@ export const url =
 export const categories: Category[] = ['python'];
 
 export const defaultConfig = {
-  managerFilePatterns: ['/(^|/)[\\w-]*requirements([-.]\\w+)?\\.(txt|pip)$/'],
+  managerFilePatterns: ['/(^|/)[\\w-]*requirements([-._]\\w+)?\\.(txt|pip)$/'],
 };
 
 export const supportedDatasources = [PypiDatasource.id, GitTagsDatasource.id];