Add several spelling corrections

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index ec382ac..6be046b 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -1957,6 +1957,7 @@
 exelent->excellent
 exellent->excellent
 exemple->example
+exension->extension
 exept->except
 exeptional->exceptional
 exerbate->exacerbate
@@ -2015,6 +2016,7 @@
 exressed->expressed
 extacy->ecstacy
 extemely->extremely
+extendded->extended
 extention->extension
 extentions->extensions
 exteral->external
@@ -2908,7 +2910,9 @@
 Lybia->Libya
 maching->machine, marching, matching,
 mackeral->mackerel
+maco->macro
 macpakge->package
+macrow->macro
 magasine->magazine
 magincian->magician
 magisine->magazine
@@ -3332,6 +3336,7 @@
 ofo->of
 oftenly->often
 oging->going, ogling,
+ojbect->object
 olny->only
 omision->omission
 omited->omitted