doc: add `added:` information for child_process

Ref: https://github.com/nodejs/node/issues/6578
PR-URL: https://github.com/nodejs/node/pull/6927
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

doc/api/child_process.md

@@ -112,6 +112,9 @@ exec('my.bat', (err, stdout, stderr) => {
 ```
 
 ### child_process.exec(command[, options][, callback])
+<!-- YAML
+added: v0.1.90
+-->
 
 * `command` {String} The command to run, with space-separated arguments
 * `options` {Object}
@@ -189,6 +192,9 @@ terminated.
 replace the existing process and uses a shell to execute the command.*
 
 ### child_process.execFile(file[, args][, options][, callback])
+<!-- YAML
+added: v0.1.91
+-->
 
 * `file` {String} The name or path of the executable file to run
 * `args` {Array} List of string arguments
@@ -234,6 +240,9 @@ stderr output. If `encoding` is `'buffer'`, or an unrecognized character
 encoding, `Buffer` objects will be passed to the callback instead.
 
 ### child_process.fork(modulePath[, args][, options])
+<!-- YAML
+added: v0.5.0
+-->
 
 * `modulePath` {String} The module to run in the child
 * `args` {Array} List of string arguments
@@ -278,6 +287,9 @@ output on this fd is expected to be line delimited JSON objects.
 not clone the current process.*
 
 ### child_process.spawn(command[, args][, options])
+<!-- YAML
+added: v0.1.90
+-->
 
 * `command` {String} The command to run
 * `args` {Array} List of string arguments
@@ -383,6 +395,9 @@ child.on('error', (err) => {
 ```
 
 #### options.detached
+<!-- YAML
+added: v0.7.10
+-->
 
 On Windows, setting `options.detached` to `true` makes it possible for the
 child process to continue running after the parent exits. The child will have
@@ -437,6 +452,9 @@ child.unref();
 ```
 
 #### options.stdio
+<!-- YAML
+added: v0.7.10
+-->
 
 The `options.stdio` option is used to configure the pipes that are established
 between the parent and child process. By default, the child's stdin, stdout,
@@ -523,6 +541,9 @@ scripting tasks and for simplifying the loading/processing of application
 configuration at startup.
 
 ### child_process.execFileSync(file[, args][, options])
+<!-- YAML
+added: v0.11.12
+-->
 
 * `file` {String} The name or path of the executable file to run
 * `args` {Array} List of string arguments
@@ -556,6 +577,9 @@ throw.  The [`Error`][] object will contain the entire result from
 [`child_process.spawnSync()`][]
 
 ### child_process.execSync(command[, options])
+<!-- YAML
+added: v0.11.12
+-->
 
 * `command` {String} The command to run
 * `options` {Object}
@@ -592,6 +616,9 @@ throw.  The [`Error`][] object will contain the entire result from
 [`child_process.spawnSync()`][]
 
 ### child_process.spawnSync(command[, args][, options])
+<!-- YAML
+added: v0.11.12
+-->
 
 * `command` {String} The command to run
 * `args` {Array} List of string arguments
@@ -626,6 +653,9 @@ completely exited. Note that if the process intercepts and handles the
 process has exited.
 
 ## Class: ChildProcess
+<!-- YAML
+added: v2.2.0
+-->
 
 Instances of the `ChildProcess` class are [`EventEmitters`][] that represent
 spawned child processes.
@@ -636,6 +666,9 @@ use the [`child_process.spawn()`][], [`child_process.exec()`][],
 instances of `ChildProcess`.
 
 ### Event: 'close'
+<!-- YAML
+added: v0.7.7
+-->
 
 * `code` {Number} the exit code if the child exited on its own.
 * `signal` {String} the signal by which the child process was terminated.
@@ -645,13 +678,16 @@ been closed. This is distinct from the `'exit'` event, since multiple
 processes might share the same stdio streams.
 
 ### Event: 'disconnect'
+<!-- YAML
+added: v0.7.2
+-->
 
 The `'disconnect'` event is emitted after calling the
 `ChildProcess.disconnect()` method in the parent or child process. After
 disconnecting it is no longer possible to send or receive messages, and the
 `ChildProcess.connected` property is false.
 
-### Event:  'error'
+### Event: 'error'
 
 * `err` {Error} the error.
 
@@ -667,7 +703,10 @@ to guard against accidentally invoking handler functions multiple times.
 
 See also [`ChildProcess#kill()`][] and [`ChildProcess#send()`][].
 
-### Event:  'exit'
+### Event: 'exit'
+<!-- YAML
+added: v0.1.90
+-->
 
 * `code` {Number} the exit code if the child exited on its own.
 * `signal` {String} the signal by which the child process was terminated.
@@ -688,6 +727,9 @@ and then will re-raise the handled signal.
 See `waitpid(2)`.
 
 ### Event: 'message'
+<!-- YAML
+added: v0.5.9
+-->
 
 * `message` {Object} a parsed JSON object or primitive value.
 * `sendHandle` {Handle} a [`net.Socket`][] or [`net.Server`][] object, or
@@ -697,6 +739,9 @@ The `'message'` event is triggered when a child process uses `process.send()`
 to send messages.
 
 ### child.connected
+<!-- YAML
+added: v0.7.2
+-->
 
 * {Boolean} Set to false after `.disconnect` is called
 
@@ -705,6 +750,9 @@ and receive messages from a child process. When `child.connected` is false, it
 is no longer possible to send or receive messages.
 
 ### child.disconnect()
+<!-- YAML
+added: v0.7.2
+-->
 
 Closes the IPC channel between parent and child, allowing the child to exit
 gracefully once there are no other connections keeping it alive. After calling
@@ -721,6 +769,9 @@ Note that when the child process is a Node.js instance (e.g. spawned using
 within the child process to close the IPC channel as well.
 
 ### child.kill([signal])
+<!-- YAML
+added: v0.1.90
+-->
 
 * `signal` {String}
 
@@ -775,6 +826,9 @@ setTimeout(() => {
 ```
 
 ### child.pid
+<!-- YAML
+added: v0.1.90
+-->
 
 * {Number} Integer
 
@@ -791,6 +845,9 @@ grep.stdin.end();
 ```
 
 ### child.send(message[, sendHandle][, callback])
+<!-- YAML
+added: v0.5.9
+-->
 
 * `message` {Object}
 * `sendHandle` {Handle}
@@ -936,6 +993,9 @@ this occurs.
 *Note: this function uses [`JSON.stringify()`][] internally to serialize the `message`.*
 
 ### child.stderr
+<!-- YAML
+added: v0.1.90
+-->
 
 * {Stream}
 
@@ -948,6 +1008,9 @@ then this will be `undefined`.
 the same value.
 
 ### child.stdin
+<!-- YAML
+added: v0.1.90
+-->
 
 * {Stream}
 
@@ -963,6 +1026,9 @@ then this will be `undefined`.
 the same value.
 
 ### child.stdio
+<!-- YAML
+added: v0.7.10
+-->
 
 * {Array}
 
@@ -1000,6 +1066,9 @@ assert.equal(child.stdio[2], child.stderr);
 ```
 
 ### child.stdout
+<!-- YAML
+added: v0.1.90
+-->
 
 * {Stream}