fix: LS host's getCurrentDirectory implementation returns project r…

…oot based on tsconfig location

Fixes #84.

lib/service-host.js

@@ -1,4 +1,6 @@
+const { dirname } = require('path');
 const ts = require('typescript');
+const { findTsconfig } = require('./find-tsconfig');
 
 const { getCompilerOptions, getVueCompilerOptions } = require('./get-compiler-options');
 
@@ -11,16 +13,17 @@ const { getCompilerOptions, getVueCompilerOptions } = require('./get-compiler-op
  * @returns {ts.LanguageServiceHost}
  */
 function getTypeScriptLanguageServiceHost(path, content) {
+	const tsconfig = findTsconfig(path);
 	const compilerOptions = getCompilerOptions(path);
 
 	return {
 		directoryExists: ts.sys.directoryExists,
 		fileExists: ts.sys.fileExists,
-		getCurrentDirectory: ts.sys.getCurrentDirectory,
 		getDefaultLibFileName: ts.getDefaultLibFileName,
 		getDirectories: ts.sys.getDirectories,
 		readDirectory: ts.sys.readDirectory,
 		readFile: ts.sys.readFile,
+		getCurrentDirectory: () => (tsconfig ? dirname(tsconfig) : ts.sys.getCurrentDirectory()),
 		getCompilationSettings: () => compilerOptions,
 		getNewLine: () => ts.sys.newLine,
 		getScriptFileNames: () => [path],