Update default upload speed

Author: ivankravets

boards/d1_mini.json

@@ -23,7 +23,7 @@
     "maximum_size": 4194304,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
-    "speed": 115200
+    "speed": 921600
   },
   "url": "https://wiki.wemos.cc/products:d1:d1_mini",
   "vendor": "WEMOS"

boards/d1_mini_lite.json

@@ -21,7 +21,7 @@
     "maximum_size": 1048576,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
-    "speed": 115200
+    "speed": 921600
   },
   "url": "https://wiki.wemos.cc/products:d1:d1_mini_lite",
   "vendor": "WEMOS"

boards/d1_mini_pro.json

@@ -23,7 +23,7 @@
     "maximum_size": 16777216,
     "require_upload_port": true,
     "resetmethod": "nodemcu",
-    "speed": 115200
+    "speed": 921600
   },
   "url": "https://wiki.wemos.cc/products:d1:d1_mini",
   "vendor": "WEMOS"

boards/esp210.json

@@ -23,7 +23,7 @@
     "maximum_size": 4194304,
     "require_upload_port": true,
     "resetmethod": "ck",
-    "speed": 115200
+    "speed": 57600
   },
   "url": "http://wiki.sweetpeas.se/index.php?title=ESP-210",
   "vendor": "SweetPea"

boards/oak.json

@@ -21,7 +21,7 @@
     "maximum_size": 4194304,
     "require_upload_port": true,
     "resetmethod": "ck",
-    "speed": 115200
+    "speed": 921600
   },
   "url": "http://digistump.com/category/22",
   "vendor": "DigiStump"