fix: don't create one webpack bundle for every test file

With the release of AEgir 13.0.6 it is no longer needed to
increase the memory size, as there will be only a single
webpack bundle for all tests, which takes little enough
memory.

package.json

@@ -12,17 +12,17 @@
     "ipfs": false
   },
   "scripts": {
-    "test": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir test",
+    "test": "aegir test",
     "test:node": "aegir test -t node",
-    "test:browser": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir test -t browser",
-    "test:webworker": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir test -t webworker",
+    "test:browser": "aegir test -t browser",
+    "test:webworker": "aegir test -t webworker",
     "lint": "aegir lint",
     "build": "aegir build",
-    "release": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir release ",
-    "release-minor": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir release --type minor ",
-    "release-major": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir release --type major ",
-    "coverage": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir coverage --timeout 100000",
-    "coverage-publish": "cross-env NODE_OPTIONS='--max-old-space-size=8192' aegir coverage --provider coveralls --timeout 100000"
+    "release": "aegir release ",
+    "release-minor": "aegir release --type minor ",
+    "release-major": "aegir release --type major ",
+    "coverage": "aegir coverage --timeout 100000",
+    "coverage-publish": "aegir coverage --provider coveralls --timeout 100000"
   },
   "dependencies": {
     "async": "^2.6.0",
@@ -65,9 +65,8 @@
     "url": "https://github.com/ipfs/js-ipfs-api"
   },
   "devDependencies": {
-    "aegir": "^13.0.0",
+    "aegir": "^13.0.6",
     "chai": "^4.1.2",
-    "cross-env": "^5.1.3",
     "dirty-chai": "^2.0.1",
     "eslint-plugin-react": "^7.6.1",
     "go-ipfs-dep": "^0.4.13",