v2.7.4: downgrade Moment.js to ~2.18.0 because of moment/moment#4227

package.json

@@ -3,7 +3,7 @@
 "bin": "./twi2fido.js",
 "preferGlobal": true,
 "main": "t2f-core.js",
-"version": "2.7.3",
+"version": "2.7.4",
 "description": "Aggregates microblog entries from Twitter and prepares them for being posted to Fidonet.",
 "keywords": ["Fidonet", "Fido", "Twitter"],
 "author": { "name": "Mithgol the Webmaster" },
@@ -18,7 +18,7 @@
    "fiunis": "~3.0.0",
    "iconv-lite": "~0.4.13",
    "lodash.unescape": "~4.0.1",
-   "moment": "~2.19.0",
+   "moment": "~2.18.0",
    "simteconf": "~1.0.0",
    "twitter": "~1.7.0",
    "xregexp": "~3.2.0"