[Dev Deps] update eslint, @ljharb/eslint-config, tape; add safe-publish-latest

Author: ljharb

package.json

@@ -9,6 +9,7 @@
 	"license": "MIT",
 	"main": "index.js",
 	"scripts": {
+		"prepublish": "safe-publish-latest",
 		"pretest": "npm run lint",
 		"test": "npm run tests-only",
 		"tests-only": "node --harmony --es-staging test",
@@ -39,12 +40,13 @@
 		"has": "^1.0.3"
 	},
 	"devDependencies": {
-		"@ljharb/eslint-config": "^15.0.2",
+		"@ljharb/eslint-config": "^16.0.0",
 		"auto-changelog": "^1.16.2",
 		"covert": "^1.1.1",
 		"eclint": "^2.8.1",
-		"eslint": "^6.7.2",
-		"tape": "^4.11.0"
+		"eslint": "^6.8.0",
+		"safe-publish-latest": "^1.1.4",
+		"tape": "^5.0.0-next.4"
 	},
 	"testling": {
 		"files": "test.js",