Update dev deps, deconstify all the functions, API doc refresh

lib/output.js

@@ -19,7 +19,7 @@ const sharp = require('../build/Release/sharp.node');
  * @returns {Promise<Object>} - when no callback is provided
  * @throws {Error} Invalid parameters
  */
-const toFile = function toFile (fileOut, callback) {
+function toFile (fileOut, callback) {
   if (!fileOut || fileOut.length === 0) {
     const errOutputInvalid = new Error('Invalid output');
     if (is.fn(callback)) {
@@ -41,7 +41,7 @@ const toFile = function toFile (fileOut, callback) {
     }
   }
   return this;
-};
+}
 
 /**
  * Write output to a Buffer.
@@ -59,14 +59,14 @@ const toFile = function toFile (fileOut, callback) {
  * @param {Function} [callback]
  * @returns {Promise<Buffer>} - when no callback is provided
  */
-const toBuffer = function toBuffer (options, callback) {
+function toBuffer (options, callback) {
   if (is.object(options)) {
     if (is.bool(options.resolveWithObject)) {
       this.options.resolveWithObject = options.resolveWithObject;
     }
   }
   return this._pipeline(is.fn(options) ? options : callback);
-};
+}
 
 /**
  * Include all metadata (EXIF, XMP, IPTC) from the input image in the output image.
@@ -77,7 +77,7 @@ const toBuffer = function toBuffer (options, callback) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const withMetadata = function withMetadata (withMetadata) {
+function withMetadata (withMetadata) {
   this.options.withMetadata = is.bool(withMetadata) ? withMetadata : true;
   if (is.object(withMetadata)) {
     if (is.defined(withMetadata.orientation)) {
@@ -89,7 +89,7 @@ const withMetadata = function withMetadata (withMetadata) {
     }
   }
   return this;
-};
+}
 
 /**
  * Use these JPEG options for output image.
@@ -105,7 +105,7 @@ const withMetadata = function withMetadata (withMetadata) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const jpeg = function jpeg (options) {
+function jpeg (options) {
   if (is.object(options)) {
     if (is.defined(options.quality)) {
       if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
@@ -140,7 +140,7 @@ const jpeg = function jpeg (options) {
     }
   }
   return this._updateFormatOut('jpeg', options);
-};
+}
 
 /**
  * Use these PNG options for output image.
@@ -152,7 +152,7 @@ const jpeg = function jpeg (options) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const png = function png (options) {
+function png (options) {
   if (is.object(options)) {
     if (is.defined(options.progressive)) {
       this._setBooleanOption('pngProgressive', options.progressive);
@@ -169,7 +169,7 @@ const png = function png (options) {
     }
   }
   return this._updateFormatOut('png', options);
-};
+}
 
 /**
  * Use these WebP options for output image.
@@ -182,7 +182,7 @@ const png = function png (options) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const webp = function webp (options) {
+function webp (options) {
   if (is.object(options) && is.defined(options.quality)) {
     if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
       this.options.webpQuality = options.quality;
@@ -204,7 +204,7 @@ const webp = function webp (options) {
     this._setBooleanOption('webpNearLossless', options.nearLossless);
   }
   return this._updateFormatOut('webp', options);
-};
+}
 
 /**
  * Use these TIFF options for output image.
@@ -216,7 +216,7 @@ const webp = function webp (options) {
  * @returns {Sharp}
  * @throws {Error} Invalid options
  */
-const tiff = function tiff (options) {
+function tiff (options) {
   if (is.object(options) && is.defined(options.quality)) {
     if (is.integer(options.quality) && is.inRange(options.quality, 1, 100)) {
       this.options.tiffQuality = options.quality;
@@ -243,15 +243,15 @@ const tiff = function tiff (options) {
     }
   }
   return this._updateFormatOut('tiff', options);
-};
+}
 
 /**
  * Force output to be raw, uncompressed uint8 pixel data.
  * @returns {Sharp}
  */
-const raw = function raw () {
+function raw () {
   return this._updateFormatOut('raw');
-};
+}
 
 /**
  * Force output to a given format.
@@ -260,7 +260,7 @@ const raw = function raw () {
  * @returns {Sharp}
  * @throws {Error} unsupported format or options
  */
-const toFormat = function toFormat (format, options) {
+function toFormat (format, options) {
   if (is.object(format) && is.string(format.id)) {
     format = format.id;
   }
@@ -268,7 +268,7 @@ const toFormat = function toFormat (format, options) {
     throw new Error('Unsupported output format ' + format);
   }
   return this[format](options);
-};
+}
 
 /**
  * Use tile-based deep zoom (image pyramid) output.
@@ -294,7 +294,7 @@ const toFormat = function toFormat (format, options) {
  * @returns {Sharp}
  * @throws {Error} Invalid parameters
  */
-const tile = function tile (tile) {
+function tile (tile) {
   if (is.object(tile)) {
     // Size of square tiles, in pixels
     if (is.defined(tile.size)) {
@@ -339,7 +339,7 @@ const tile = function tile (tile) {
     throw new Error('Invalid tile format ' + this.options.formatOut);
   }
   return this._updateFormatOut('dz');
-};
+}
 
 /**
  * Update the output format unless options.force is false,
@@ -350,10 +350,10 @@ const tile = function tile (tile) {
  * @param {Boolean} [options.force=true] - force output format, otherwise attempt to use input format
  * @returns {Sharp}
  */
-const _updateFormatOut = function _updateFormatOut (formatOut, options) {
+function _updateFormatOut (formatOut, options) {
   this.options.formatOut = (is.object(options) && options.force === false) ? 'input' : formatOut;
   return this;
-};
+}
 
 /**
  * Update a Boolean attribute of the this.options Object.
@@ -362,31 +362,31 @@ const _updateFormatOut = function _updateFormatOut (formatOut, options) {
  * @param {Boolean} val
  * @throws {Error} Invalid key
  */
-const _setBooleanOption = function _setBooleanOption (key, val) {
+function _setBooleanOption (key, val) {
   if (is.bool(val)) {
     this.options[key] = val;
   } else {
     throw new Error('Invalid ' + key + ' (boolean) ' + val);
   }
-};
+}
 
 /**
  * Called by a WriteableStream to notify us it is ready for data.
  * @private
  */
-const _read = function _read () {
+function _read () {
   if (!this.options.streamOut) {
     this.options.streamOut = true;
     this._pipeline();
   }
-};
+}
 
 /**
  * Invoke the C++ image processing pipeline
  * Supports callback, stream and promise variants
  * @private
  */
-const _pipeline = function _pipeline (callback) {
+function _pipeline (callback) {
   const that = this;
   if (typeof callback === 'function') {
     // output=file/buffer
@@ -480,7 +480,7 @@ const _pipeline = function _pipeline (callback) {
       });
     }
   }
-};
+}
 
 // Deprecated output options
 /* istanbul ignore next */