[Tests] require 0.8 to be passing again

Revert "[Tests] allow 0.8 to fail, pending burl/mock-env#2"

This reverts commit 376c98d.

.travis.yml

@@ -11,6 +11,7 @@ node_js:
   - "iojs-v1.8"
   - "0.12"
   - "0.10"
+  - "0.8"
 before_install:
   - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ]; then npm install -g npm@1.3 ; elif [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then case "$(npm --version)" in 1.*) npm install -g npm@1.4.28 ;; 2.*) npm install -g npm@2 ;; esac ; fi'
   - 'if [ "${TRAVIS_NODE_VERSION}" != "0.6" ] && [ "${TRAVIS_NODE_VERSION}" != "0.9" ]; then npm install -g npm; fi'
@@ -145,8 +146,6 @@ matrix:
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "0.9"
       env: TEST=true ALLOW_FAILURE=true
-    - node_js: "0.8"
-      env: TEST=true ALLOW_FAILURE=true
     - node_js: "0.6"
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "0.4"

package.json

@@ -47,7 +47,7 @@
 	"devDependencies": {
 		"@ljharb/eslint-config": "^11.0.0",
 		"eslint": "^3.19.0",
-		"mock-env": "^0.1.3",
+		"mock-env": "^0.2.0",
 		"nsp": "^2.6.3",
 		"tape": "^4.6.3"
 	},