Change normalisation of ordered-imports

This makes it consistent with TypeScript's Organize Imports command

Fixes #4063

src/rules/orderedImportsRule.ts

@@ -127,7 +127,7 @@ export class Rule extends Lint.Rules.AbstractRule {
 type Transform = (x: string) => string;
 const TRANSFORMS = new Map<string, Transform>([
  ["any", () => ""],
- ["case-insensitive", (x) => x.toLowerCase()],
+ ["case-insensitive", (x) => x.toUpperCase()],
  ["lowercase-first", flipCase],
  ["lowercase-last", (x) => x],
  ["full", (x) => x],

test/rules/ordered-imports/case-insensitive/test.ts.fix

@@ -6,6 +6,10 @@ import {A, B} from 'foo'; // failure
 import {A, bz, C} from 'foo'; // failure
 import {A, b, C} from 'zfoo';
 
+// Underscores come last.
+import {A, C, _b} from 'zfoo'; // failure
+import {A, C, _b} from 'zfoo';
+
 import {g} from "y"; // failure
 import {
  a as d,

test/rules/ordered-imports/case-insensitive/test.ts.lint

@@ -9,6 +9,11 @@ import {bz, A, C} from 'foo'; // failure
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [Import sources within a group must be alphabetized.]
  ~~~~~ [Named imports must be alphabetized.]
 
+// Underscores come last.
+import {A, _b, C} from 'zfoo'; // failure
+ ~~~~~ [Named imports must be alphabetized.]
+import {A, C, _b} from 'zfoo';
+
 import {
  b as c,
  ~~~~~~~