Drop support for Node.js v11

Drop claims of supporting the EOL v11 branch of Node.js.

README.md

@@ -101,7 +101,7 @@ Plugins](/docs/writing-plugins.md) for where to start.
 **Warning**: These instructions are for the unstable master version and is not
 recommended for use, see [the 1.2.x branch][1.2.x] for how to install the stable version.
 
-Clusterio runs on Node.js v12 and up, v11.13.0+ and v10.16.0+.  Node.js itself is not
+Clusterio runs on Node.js v12 and up, and v10.16.0+.  Node.js itself is not
 supported on EOL Ubuntu releases so make sure you're on a recent release of Ubuntu.
 
 Master and all slaves:
@@ -142,7 +142,7 @@ recommended for use, see [the 1.2.x branch][1.2.x] for how to install the stable
 **Requirements**
 
 download and install nodeJS 12 from http://nodejs.org.  Clusterio runs on Node.js v12 and
-up, v11.13.0+ and v10.16.0+.
+up, and v10.16.0+.
 
 **Master**
 

docs/contributing.md

@@ -187,7 +187,7 @@ of this log should be self explanatory, please follow it carefully.
 Supported Node.js and Factorio Versions
 ---------------------------------------
 
-Clusterio run on Node.js v12 and up, v11.13.0+ and v10.16.0+, make sure
+Clusterio run on Node.js v12 and up, and v10 from v10.16.0, make sure
 to check that the Node builtin API's and npm packages you use are
 supported on these versions.  The Travis CI tests are runned on whatever
 version of Node.js v10 is the default, which at the time of writing is

package.json

@@ -18,7 +18,7 @@
     ]
   },
   "engines": {
-    "node": ">=10.16 <11 || >= 11.13"
+    "node": ">=10.16 <11 || >= 12"
   },
   "devDependencies": {
     "@clusterio/ctl": "file:./packages/ctl",

packages/ctl/package.json

@@ -15,7 +15,7 @@
     "factorio"
   ],
   "engines": {
-    "node": ">=10.16 <11 || >= 11.13"
+    "node": ">=10.16 <11 || >= 12"
   },
   "dependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0",

packages/lib/package.json

@@ -8,7 +8,7 @@
     "factorio"
   ],
   "engines": {
-    "node": ">=10.16 <11 || >= 11.13"
+    "node": ">=10.16 <11 || >= 12"
   },
   "dependencies": {
     "ajv": "^6.12.6",

packages/master/package.json

@@ -16,7 +16,7 @@
     "factorio"
   ],
   "engines": {
-    "node": ">=10.16 <11 || >= 11.13"
+    "node": ">=10.16 <11 || >= 12"
   },
   "dependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0",

packages/slave/package.json

@@ -15,7 +15,7 @@
     "factorio"
   ],
   "engines": {
-    "node": ">=10.16 <11 || >= 11.13"
+    "node": ">=10.16 <11 || >= 12"
   },
   "dependencies": {
     "@clusterio/lib": "^2.0.0-alpha.0",