JavaScript: Add failing test case.

Author: Max Schaefer

javascript/ql/test/library-tests/NPM/Modules.expected

@@ -1,6 +1,7 @@
 | b | src/node_modules/b/lib/index.js:1:1:2:0 | <toplevel> |
 | b | src/node_modules/b/lib/index.ts:1:1:2:0 | <toplevel> |
 | c | src/node_modules/c/src/index.js:1:1:2:0 | <toplevel> |
+| d | src/node_modules/d/main.js:1:1:2:0 | <toplevel> |
 | test-package | src/index.js:1:1:4:0 | <toplevel> |
 | test-package | src/lib/tst2.js:1:1:1:14 | <toplevel> |
 | test-package | src/lib/tst.js:1:1:4:0 | <toplevel> |

javascript/ql/test/library-tests/NPM/NPMPackage_getMainModule.expected

@@ -1,4 +1,5 @@
 | b | src/node_modules/b/lib/index.ts:1:1:2:0 | <toplevel> |
 | c | src/node_modules/c/src/index.js:1:1:2:0 | <toplevel> |
+| d | src/node_modules/d/main.js:1:1:2:0 | <toplevel> |
 | test-package | src/index.js:1:1:4:0 | <toplevel> |
 | third-party-module | src/node_modules/third-party-module/fancy.js:1:1:4:0 | <toplevel> |

javascript/ql/test/library-tests/NPM/PackageJSON.expected

@@ -1,4 +1,5 @@
 | src/node_modules/b/package.json:1:1:4:1 | {\\n  "na ... "lib"\\n} |
 | src/node_modules/c/package.json:1:1:4:1 | {\\n  "na ... src/"\\n} |
+| src/node_modules/d/package.json:1:1:4:1 | {\\n  "na ... main"\\n} |
 | src/node_modules/third-party-module/package.json:1:1:5:1 | {\\n  "na ... y.js"\\n} |
 | src/package.json:1:1:18:1 | {\\n  "na ... "\\n  }\\n} |