chore(): add declarations file

Author: jgw96

src/declarations.d.ts

@@ -0,0 +1,11 @@
+/*
+  Declaration files are how the Typescript compiler knows about the type information(or shape) of an object.
+  They're what make intellisense work and make Typescript know all about your code.
+  A wildcard module is declared below to allow third party libraries to be used in an app even if they don't
+  provide their own type declarations.
+  To learn more about using third party libraries in an Ionic app, check out the docs here:
+  http://ionicframework.com/docs/v2/resources/third-party-libs/
+  For more info on type definition files, check out the Typescript docs here:
+  https://www.typescriptlang.org/docs/handbook/declaration-files/introduction.html
+*/
+declare module '*';