Upgrade old deps used

[emanuelb]

bither-android/build.gradle

Line 9 in c4f4a68

classpath 'com.android.tools.build:gradle:2.3.2'

latest: 4.2.2

bither-android/bither-android/build.gradle

Line 27 in 5455fdb

compile 'com.google.protobuf:protobuf-java:2.5.0'

latest: 3.17.3

bither-android/bither-android/build.gradle

Line 28 in 5455fdb

compile 'com.android.support:appcompat-v7:19.+'

latest: 28.0.0

bither-android/bither-android/build.gradle

Line 30 in 5455fdb

compile 'com.google.zxing:core:3.1.0@jar'

latest: 3.4.1

bither-android/bither-android/build.gradle

Line 31 in 5455fdb

compile 'com.android.support:multidex:1.0.0'

latest: 1.0.3

bither-android/bither-android/build.gradle

Line 32 in 5455fdb

compile('com.github.tony19:logback-android-classic:1.0.10-2@jar') {

latest: 1.1.1-6