Add the github-linguist package

This commit only adds a single package and all of its transitive
dependencies. The github-linguist package will be used for counting
lines of code as a baseline for databases we are analyzing.

node_modules/github-linguist/dist/languages.d.ts

@@ -0,0 +1,43 @@
+export interface DetectorOptions {
+}
+/**
+ * detecte program language through file extension
+ *
+ * @export
+ * @class LanguageDetector
+ */
+export declare class Languages {
+    extensionMap: {
+        [key: string]: string;
+    };
+    /**
+     * Creates an instance of Detector.
+     */
+    constructor();
+    /**
+     * load language before detecting
+     */
+    private loadExtensionMap;
+    /**
+     * Retrieve the regular expressions for a given language.
+     * This is incomplete, but covers most of the languages we
+     * see in the wild.
+     *
+     * @param language the language to retrieve regexes for
+     */
+    getRegexes(language: string): Regexes;
+    /**
+     * return extension map
+     */
+    getExtensionMap(): {
+        [key: string]: string;
+    };
+}
+export interface Regexes {
+    singleLineComment: RegExp;
+    multiLineCommentOpen: RegExp;
+    multiLineCommentOpenStart: RegExp;
+    multiLineCommentClose: RegExp;
+    multiLineCommentCloseEnd: RegExp;
+    multiLineCommentOpenAndClose: RegExp;
+}