[Tests] up to node v10.8, v9.11, v8.11, v6.14, v4.9; use …

…`nvm install-latest-npm`

.travis.yml

@@ -2,19 +2,21 @@ language: node_js
 os:
  - linux
 node_js:
-  - "9.4"
-  - "8.9"
+  - "10.8"
+  - "9.11"
+  - "8.11"
   - "7.10"
-  - "6.12"
+  - "6.14"
   - "5.12"
-  - "4.8"
+  - "4.9"
   - "iojs-v3.3"
   - "iojs-v2.5"
   - "iojs-v1.8"
   - "0.12"
   - "0.10"
   - "0.8"
 before_install:
+  - 'case "${TRAVIS_NODE_VERSION}" in 0.*) export NPM_CONFIG_STRICT_SSL=false ;; esac'
   - 'nvm install-latest-npm'
 install:
   - 'if [ "${TRAVIS_NODE_VERSION}" = "0.6" ] || [ "${TRAVIS_NODE_VERSION}" = "0.9" ]; then nvm install --latest-npm 0.8 && npm install && nvm use "${TRAVIS_NODE_VERSION}"; else npm install; fi;'
@@ -33,6 +35,36 @@ matrix:
       env: PRETEST=true
     - node_js: "lts/*"
       env: POSTTEST=true
+    - node_js: "10.7"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.6"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.5"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.4"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.3"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.2"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.1"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "10.0"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.10"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.9"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.8"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.7"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.6"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.5"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "9.4"
+      env: TEST=true ALLOW_FAILURE=true
     - node_js: "9.3"
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "9.2"
@@ -41,6 +73,10 @@ matrix:
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "9.0"
       env: TEST=true ALLOW_FAILURE=true
+    - node_js: "8.10"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "8.9"
+      env: TEST=true ALLOW_FAILURE=true
     - node_js: "8.8"
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "8.7"
@@ -79,6 +115,10 @@ matrix:
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "7.0"
       env: TEST=true ALLOW_FAILURE=true
+    - node_js: "6.13"
+      env: TEST=true ALLOW_FAILURE=true
+    - node_js: "6.12"
+      env: TEST=true ALLOW_FAILURE=true
     - node_js: "6.11"
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "6.10"
@@ -127,6 +167,8 @@ matrix:
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "5.0"
       env: TEST=true ALLOW_FAILURE=true
+    - node_js: "4.8"
+      env: TEST=true ALLOW_FAILURE=true
     - node_js: "4.7"
       env: TEST=true ALLOW_FAILURE=true
     - node_js: "4.6"