chore(package): drop 4.x and 6.x Node support

BREAKING CHANGE: drop 4.x and 6.x Node support

Author: Peter Marton

.travis.yml

@@ -1,10 +1,9 @@
 language: node_js
 node_js:
-    - "4"
-    - "6"
-    - "8"
-    - "stable"
+   - '8'
+   - '10'
+   - "lts/*"                # Active LTS release
+   - "node"                 # Latest stable release
 after_success:
     - make report-coverage
-    - make nsp
 

Makefile

@@ -26,7 +26,6 @@ ESLINT		:= $(NODE_BIN)/eslint
 ISTANBUL	:= $(NODE_BIN)/istanbul
 MOCHA		:= $(NODE_BIN)/mocha
 _MOCHA		:= $(NODE_BIN)/_mocha
-NSP		:= $(NODE_BIN)/nsp
 UNLEASH		:= $(NODE_BIN)/unleash
 
 
@@ -77,13 +76,8 @@ lint: $(NODE_MODULES) ## Run lint and style checks
 	@$(ESLINT) $(ALL_FILES)
 
 
-.PHONY: nsp
-nsp: $(NODE_MODULES) $(YARN_LOCK) ## Check for dependency vulnerabilities
-	@$(NSP) check --preprocessor yarn
-
-
 .PHONY: prepush
-prepush: $(NODE_MODULES) lint test nsp ## Run all required tasks for a git push
+prepush: $(NODE_MODULES) lint test ## Run all required tasks for a git push
 
 
 .PHONY: test

package.json

@@ -42,8 +42,6 @@
     "istanbul": "^0.4.5",
     "mkdirp": "^0.5.1",
     "mocha": "^6.1.4",
-    "nsp": "^3.2.1",
-    "nsp-preprocessor-yarn": "^1.0.1",
     "restify": "^8.3.1",
     "restify-clients": "^2.6.4"
   },