Revert "drop support for ie9 and ie10; closes #3148"

This reverts commit 3f314b6.

Makefile

@@ -21,6 +21,7 @@ mocha.js: $(SRC) browser-entry.js
 	@printf "==> [Browser :: build]\n"
 	mkdir -p ${@D}
 	$(BROWSERIFY) ./browser-entry \
+		--require buffer/:buffer \
 		--plugin ./scripts/dedefine \
 		--ignore 'fs' \
 		--ignore 'glob' \

karma.conf.js

@@ -9,6 +9,8 @@ const browserPlatformPairs = {
   'chrome@latest': 'Windows 8',
   'MicrosoftEdge@latest': 'Windows 10',
   'internet [email protected]': 'Windows 8.1',
+  'internet [email protected]': 'Windows 8',
+  'internet [email protected]': 'Windows 7',
   'firefox@latest': 'Windows 10',
   'safari@latest': 'OS X 10.12'
 };
@@ -37,7 +39,7 @@ module.exports = config => {
           .ignore('fs')
           .ignore('path')
           .ignore('supports-color')
-          // .require(path.join(__dirname, 'node_modules', 'buffer'), {expose: 'buffer'})
+          .require(path.join(__dirname, 'node_modules', 'buffer'), {expose: 'buffer'})
           .on('bundled', (err, content) => {
             if (!err && bundleDirpath) {
               // write bundle to directory for debugging

package.json

@@ -325,6 +325,7 @@
     "assert": "^1.4.1",
     "assetgraph-builder": "^5.6.4",
     "browserify": "^14.4.0",
+    "buffer": "^4.9.1",
     "coffee-script": "^1.10.0",
     "coveralls": "^3.0.0",
     "cross-spawn": "^5.1.0",
@@ -367,7 +368,8 @@
     "fs": false,
     "glob": false,
     "path": false,
-    "supports-color": false
+    "supports-color": false,
+    "buffer": "buffer"
   },
   "homepage": "https://mochajs.org",
   "logo": "https://cldup.com/S9uQ-cOLYz.svg"