Updated to angular 10

Moved to eslint for linting
Added prettier for formatting
Fixed minor errors

bookie/.prettierrc.js

@@ -0,0 +1,8 @@
+module.exports = {
+  trailingComma: "all",
+  tabWidth: 2,
+  semi: true,
+  singleQuote: true,
+  bracketSpacing: true,
+  printWidth: 100
+};