Add integration test for reset author command.

test/integration/resetAuthor/expected/repo/.git_keep/COMMIT_EDITMSG

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+myfile2

test/integration/resetAuthor/expected/repo/.git_keep/HEAD

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+ref: refs/heads/master

test/integration/resetAuthor/expected/repo/.git_keep/config

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+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = false
+	logallrefupdates = true
+	ignorecase = true
+	precomposeunicode = true
+[user]
+	email = Author2@example.com
+	name = Author2

test/integration/resetAuthor/expected/repo/.git_keep/description

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+Unnamed repository; edit this file 'description' to name the repository.

test/integration/resetAuthor/expected/repo/.git_keep/info/exclude

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+# git ls-files --others --exclude-from=.git/info/exclude
+# Lines that start with '#' are comments.
+# For a project mostly in C, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~

test/integration/resetAuthor/expected/repo/.git_keep/logs/HEAD

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+0000000000000000000000000000000000000000 291bcc7e708303b395f52245ec988ddbc985bae3 Author1 <Author1@example.com> 1651932821 +0200	commit (initial): myfile1
+291bcc7e708303b395f52245ec988ddbc985bae3 63aff3f0f54955ea149f9c2f3c07697b8864940d Author1 <Author1@example.com> 1651932821 +0200	commit: myfile2
+63aff3f0f54955ea149f9c2f3c07697b8864940d 0714eb875f11c56a2dc8c53c148889fe43602349 Author2 <Author2@example.com> 1651932824 +0200	commit (amend): myfile2

test/integration/resetAuthor/expected/repo/.git_keep/logs/refs/heads/master

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+0000000000000000000000000000000000000000 291bcc7e708303b395f52245ec988ddbc985bae3 Author1 <Author1@example.com> 1651932821 +0200	commit (initial): myfile1
+291bcc7e708303b395f52245ec988ddbc985bae3 63aff3f0f54955ea149f9c2f3c07697b8864940d Author1 <Author1@example.com> 1651932821 +0200	commit: myfile2
+63aff3f0f54955ea149f9c2f3c07697b8864940d 0714eb875f11c56a2dc8c53c148889fe43602349 Author2 <Author2@example.com> 1651932824 +0200	commit (amend): myfile2

test/integration/resetAuthor/expected/repo/.git_keep/objects/29/1bcc7e708303b395f52245ec988ddbc985bae3

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+x
•�Q
+Â0DýÎ)ö_�lºÝ¦ ¢GÙ&,t‰”z{ƒx
¿fx0oR5[ ó¡íªà•SñÂË4kÌDŠ‘sÄ X&ZhÈLEÒœ<Û½îpûÂùW®ú{lzJÕ.];â<„Ž>xï:íwMÿ:{—uStÈ×5'

test/integration/resetAuthor/expected/repo/.git_keep/objects/63/aff3f0f54955ea149f9c2f3c07697b8864940d

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+x
•ŽK
+1]çÙ’î$=iÑ£äÓÁ�‰3ôöñ®ªxPðòÚÚÜ5‚;ô]DÇÉ:ˆž«)E¤2±×D–Äd*: µÅ]#dH9O2™`�M–}õˆÎKæJI>E±*>û}ÝõíÐçŸ\åÛ¶È)¯í¢�<°Å€ ��Qc÷ºüªö®ó"¨>dB„

test/integration/resetAuthor/expected/repo/.git_keep/refs/heads/master

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+0714eb875f11c56a2dc8c53c148889fe43602349

test/integration/resetAuthor/expected/repo/myfile1

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+test1

test/integration/resetAuthor/expected/repo/myfile2

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+test2

test/integration/resetAuthor/recording.json

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+{"KeyEvents":[{"Timestamp":638,"Mod":0,"Key":256,"Ch":52},{"Timestamp":1406,"Mod":0,"Key":256,"Ch":97},{"Timestamp":2584,"Mod":0,"Key":256,"Ch":121},{"Timestamp":5654,"Mod":0,"Key":256,"Ch":113}],"ResizeEvents":[{"Timestamp":0,"Width":117,"Height":83}]}

test/integration/resetAuthor/setup.sh

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+#!/bin/sh
+
+set -e
+
+cd $1
+
+git init
+
+git config user.email "Author1@example.com"
+git config user.name "Author1"
+
+echo test1 > myfile1
+git add .
+git commit -am "myfile1"
+echo test2 > myfile2
+git add .
+git commit -am "myfile2"
+
+git config user.email "Author2@example.com"
+git config user.name "Author2"

test/integration/resetAuthor/test.json

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+{ "description": "In this test the author of a commit is reset to a different name/email.", "speed": 5 }