chore(typescript): fixes dart failures and linter

Closes #4359

docs/typescript-package/services/tsParser/createCompilerHost.js

@@ -58,11 +58,17 @@ module.exports = function createCompilerHost(log) {
         return ts.sys.newLine;
       },
       fileExists: function(fileName) {
-        var stats;
-        fs.stat(fileName, function(err, s) {
-           stats = s;
-        });
-        return !!stats;
+        var resolvedPath = path.resolve(baseDir, fileName);
+        try {
+          fs.statSync(resolvedPath);
+          return true;
+        } catch (e) {
+          return false;
+        }
+      },
+      readFile: function(fileName) {
+        var resolvedPath = path.resolve(baseDir, fileName);
+        return fs.readFileSync(resolvedPath, { encoding: options.charset });
       }
     };
   };

docs/typescript-package/services/tsParser/getFileInfo.js

@@ -4,9 +4,6 @@ var ts = require('typescript');
 module.exports = function getFileInfo(log) {
 
   return function (symbol, basePath) {
-    if (!symbol.declarations) {
-      console.log("ouch", symbol);
-    }
     var fileName = ts.getSourceFileOfNode(symbol.declarations[0]).fileName;
 
     var file = path.resolve(basePath, fileName);